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Metformin hydrochloride 500 mg Tablet, Extended Release, 270-count — NDC 71610-0554-92 package photo
Label image from the product's FDA listing (DailyMed) — may show a different pack size or an older label revision.

Metformin hydrochloride 500 mg Tablet, Extended Release, 270-count — NDC 71610-554-92 (Billing 71610-0554-92)

by Aphena Pharma Solutions - Tennessee, LLC · 270 TABLET, EXTENDED RELEASE in 1 BOTTLE, PLASTIC

This is a package of 270 tablets of Metformin hydrochloride 500 mg Tablet, Extended Release from Aphena Pharma Solutions - Tennessee, LLC, marketed since Jul 2018 and currently FDA-listed.

NDC 71610-0554-92
🏷️ FDA NDC (as labeled) 71610-554-92 billing pads the product segment with a zero
This package
Contains270-count Pack sizes7 compare ↓
Also priced by: Part D plans $0.1129/unit — full pricing hub ↓
Product page 71610-0554-30 Also comes in: 30 tablets 71610-554-30 60 tablets 71610-554-53 90 tablets 71610-554-60 120 tablets 71610-554-70 180 tablets 71610-554-80 360 tablets 71610-554-94
Rx only Generic On market Non-controlled ⇄ Compare with another NDC
🗂️ FDA directory synced Oct 8, 2026 · this listing last changed Jul 24, 2026 · sources: openFDA · FDA label (DailyMed) · FDA Orange & Purple Book · First Databank · CMS NADAC, ASP, Medicare & Medicaid · RxNorm
📋 All sources & update times →

This page is curated, coded, and maintained by

Compiled from public FDA, CMS, DailyMed, NADAC, and related drug data sources. Editorial policy

NDC database record

One package, one record: these facts belong to NDC 71610-554-92 alone.

Record
FDA NDC Directory package listing · Human prescription drug
Code segments
71610 labeler · 554 product · 92 package
Package marketed since
Jun 18, 2021
Sample package
No — commercial package
Listing certified through
Dec 31, 2026
Billing quantity
270 EA per package
Barcode (UPC-A, from the NDC)
3 7161055492 5
FDA record last changed
Jul 24, 2026
⚠️
Other active recalls for Metformin Hydrochloride (different manufacturers) — 1 · tap to view
These affect other manufacturers’ products for the same ingredient — not necessarily the exact NDC on this page.
Class II · Feb 25, 2025 — Presence of Foreign Tablets/Capsules. (A-S Medication Solutions LLC) · FDA recall D-0292-2025
Each entry is an official FDA enforcement report — look up any recall number in the FDA recall database ↗

Identity & classification

Regulatory identifiers FDA, NLM and CMS codes for this package

FDA NDC (as labeled) 71610-554-92
Product NDC 71610-554
11-digit billing NDC 71610055492
NCPDP billing unit EA — each (per item)
RxCUI 860975
UNII 786Z46389E
Application # ANDA207427
SPL Set ID 5e5fb10b-b874-43c9-9424-9080b9e866c8
Established class (EPC) Biguanide
Chemical class Biguanides
DEA schedule Non-controlled
Marketing category ANDA
Marketing status On market
FDA listing status Listed (active directory)
Marketing start 2018-07-17
Route ORAL
Dosage form TABLET, EXTENDED RELEASE
Substance METFORMIN HYDROCHLORIDE
TE code (Orange Book) AB1 · RLD · RS

Drug-database identifiers Medi-Span GPI and First Databank GCN / HICL / AHFS classification

GPI-14 27250050007520
GPI class metFORMIN HCl ER
GCN Seq No 046754
GCN 89863
HICL code 004763
Ingredient (HICL) Metformin Hcl
HIC1 code C
Therapeutic class — broad (HIC1) Electrolyte Balance/Metabolism/Nutrition
HIC2 code C4
Therapeutic class — intermediate (HIC2) Antihyperglycemics
HIC3 code C4L
Therapeutic class — specific (HIC3) Antihyperglycemic, Biguanide Type
AHFS code 68:20.04.00
AHFS class Biguanides
FDB label name METFORMIN HCL ER 500 MG TABLET
FDB brand name Metformin Hcl Er
Legend status F — Federal legend — prescription drug or device
Quick answers
  • GSN (GCN sequence number): 046754
  • GCN: 89863
  • GPI-14 (Medi-Span): 27250050007520
  • HICL (First Databank): 004763
  • AHFS class code: 68:20.04.00
  • RxCUI (RxNorm): 860975
Why two NDCs? The FDA registers this code as 71610-554-92 — a 5-3-2 layout, and that's what's printed on the package and shown on DailyMed. For insurance claims, every NDC is standardized to a uniform 11-digit 5-4-2 format by adding a zero to the product segment → 71610-0554-92. Same drug, same package — only the format differs.
Where does this data come from?
Identifiers from the FDA openFDA NDC Directory and Structured Product Labeling; RxCUI from RxNorm (NLM); GPI from Medi-Span; GCN / HIC / AHFS / legend from First Databank.

RxNorm drug class

This medicine belongs to the Biguanide class.

Pharmacologic class Biguanide
Drug family (ATC) Biguanides
Where does this data come from?
Therapeutic classes from RxNorm RxClass (U.S. National Library of Medicine) — Established Pharmacologic Class (FDA), ATC drug family (WHO) and mechanism of action, matched by this product’s RxCUI.

Clinical

Label name METFORMIN HCL ER 500 MG TABLET Ingredient Metformin Hcl
📖 What it is MedlinePlus · NLM

Metformin is used alone or with other medications, including insulin, to treat type 2 diabetes (condition in which the body does not use insulin normally and, therefore, cannot control the amount of sugar in the blood). Metformin is in a class of drugs called biguanides. Metformin helps to control the amount of glucose (sugar) in your blood. It decreases the amount of glucose you absorb from your food and the amount of glucose made by your liver. Metformin also increases your body's response to insulin, a natural substance that controls the amount of glucose in the blood. Metformin is not used...

Read the full MedlinePlus article ↗
📗 Our plain-language guide HelloPharmacist
  • Metformin works in three ways: it lowers the amount of sugar your liver dumps into your bloodstream, slows how much sugar your gut absorbs from food, and helps your body respond to...
  • What exactly is metformin doing for my diabetes?
  • Yes, this is very common — diarrhea, nausea, and stomach discomfort are the most frequently reported side effects, and they're often worst when you first start or when your dose go...
  • My stomach has been a mess since I started metformin. Is that normal? Will it get better?
📖 Read our full Metformin guide →
4
Nutrient depletion considerations

Metformin Hydrochloride may be associated with lower levels of 4 nutrients — worth a chat with your pharmacist, not a cause for alarm.

🧪 Full Metformin Hydrochloride nutrient depletion report →
An association is not a deficiency. Educational only — don't start or stop anything without professional guidance.
Where does this data come from?
Plain-language summary from MedlinePlus (U.S. National Library of Medicine); supplement & herbal interactions and nutrient depletion data from the Natural Medicines database; our full guide is HelloPharmacist editorial content.

Pricing

A drug doesn't have one price. Each row is a different public payment system, and none is what you'd pay at the counter — that depends on your insurance. The ⓘ on each row explains what it measures.

Price systemPer eachPer package
Retail pharmacies payNADAC · weekly Not in the retail survey — common for institutional, discontinued, or low-volume packs.
Medicaid paysCMS SDUD · 12 mo No recent Medicaid claims on file for this NDC — rare and low-volume NDCs are suppressed in the public data.
Medicare drug plans payPart D · Q2 2026 $0.1129 $30.48 / 270 tablets
Where does this data come from?
NADAC (National Average Drug Acquisition Cost) is the CMS weekly pharmacy-acquisition-cost survey — what pharmacies pay. ASP (Average Sales Price) is the CMS Medicare Part B drug-payment file, published quarterly. Medicaid pays is computed by us from CMS State Drug Utilization Data (total reimbursed ÷ units, trailing 12 months) — gross of rebates and inclusive of dispensing fees, so it reflects what Medicaid paid, not an acquisition cost. Medicare drug plans pay is the median negotiated point-of-sale unit cost across plans listing this NDC in the CMS quarterly Prescription Drug Plan pricing files, before rebates. The VA pays is the federal contract price (FSS, and the statutory Big 4 ceiling where listed) from the VA National Acquisition Center pharmaceutical price file. All are free public government data; each measures a different payer, so the figures are not directly comparable.

Packaging — all sizes for this product

Package NDCDescription Marketing startMarketing endStatus
71610-0554-30 71610-554-30 Main listing 30 TABLET, EXTENDED RELEASE in 1 BOTTLE, PLASTIC 2021-05-12 — Active
71610-0554-53 71610-554-53 60 TABLET, EXTENDED RELEASE in 1 BOTTLE, PLASTIC 2022-01-31 — Active
71610-0554-60 71610-554-60 90 TABLET, EXTENDED RELEASE in 1 BOTTLE, PLASTIC 2021-05-12 — Active
71610-0554-70 71610-554-70 120 TABLET, EXTENDED RELEASE in 1 BOTTLE, PLASTIC 2021-06-09 — Active
71610-0554-80 71610-554-80 180 TABLET, EXTENDED RELEASE in 1 BOTTLE, PLASTIC 2022-01-18 — Active
71610-0554-92 You're viewing this 270 TABLET, EXTENDED RELEASE in 1 BOTTLE, PLASTIC 2021-06-18 — Active
71610-0554-94 71610-554-94 360 TABLET, EXTENDED RELEASE in 1 BOTTLE, PLASTIC 2021-08-18 — Active

You're viewing one of 7 pack sizes for this product.

Pack size FAQ

What quantity is in this package?
This is a 270-count package — 270 tablet, extended release in 1 bottle, plastic.
How does this package differ from NDC 71610-0554-30?
Both are Metformin hydrochloride 500 mg Tablet, Extended Release — the drug itself is identical. This page's package is the 270-count one, while NDC 71610-0554-30 is the 30 tablets package.
What NDC number is used to bill for this package of Metformin hydrochloride 500 mg Tablet, Extended Release?
Use the 11-digit billing form listed in the identifiers section of this page. Pharmacy and medical claims use the 11-digit form; the FDA label may print a shorter form of the same code.

Therapeutic equivalents

ProductLabelerPackNADAC/unitTEStatusPrice vs. this
Metformin Hydrochloride 500 mg 29300-0389-01 Unichem 100 tablets $0.028 AB1 Availability likely —
Metformin Hydrochloride 500 mg 42385-0977-01 Laurus 100 tablets $0.028 AB1 Availability likely —
Metformin Hydrochloride 500 mg 42806-0632-01 Epic 100 tablets $0.028 AB1 Availability likely —
Metformin Hydrochloride Extended Release 500 mg 49483-0623-01 TIME 100 tablets $0.028 AB1 Availability likely —
Metformin Hydrochloride 500 mg 50268-0550-15 AvPAK 1 tablet $0.028 AB1 Availability likely —
Metformin Hydrochloride 500 mg 67877-0159-01 Ascend 100 tablets $0.028 AB1 Availability likely —
Metformin Hydrochloride 500 mg 67877-0413-01 Ascend 100 tablets $0.028 AB1 Availability likely —
Metformin Hydrochloride 500 mg 68094-0904-50 Precision 100 tablets $0.028 AB1 Availability likely —
Metformin 500 mg 68645-0595-59 Legacy 60 tablets $0.028 AB1 Availability likely —
Metformin Hydrochloride Er 500 mg 69315-0410-01 Leading 100 tablets $0.028 AB1 Availability likely —
Metformin 500 mg 70010-0491-01 Granules 100 tablets $0.028 AB1 Availability likely —
Metformin ER 500 mg 82009-0117-10 Quallent 1000 tablets $0.028 AB1 Availability likely —
Metformin Hydrochloride 500 mg 82009-0180-05 Quallent 500 tablets $0.028 AB1 Availability likely —
Metformin Hydrochloride 500 mg 62756-0142-01 Sun 100 tablets $0.029 — FDA listed —
Metformin hydrochloride 500 mg 33342-0239-11 Macleods 100 tablets $0.031 AB1 FDA listed —
Metformin Hydrochloride 500 mg 51224-0007-50 TAGI 100 tablets $0.031 AB1 FDA listed —
Metformin Hydrochloride 500 mg 69367-0412-60 Westminster 60 tablets $0.164 AB2 Availability likely —
Metformin hydrochloride 500 mg 27241-0188-60 Ajanta 60 tablets $0.164 AB2 Availability likely —
Metformin Hydrochloride 500 mg 59651-0042-60 Aurobindo 60 tablets $0.164 AB2 Availability likely —
Metformin Hydrochloride 500 mg 42571-0333-01 Micro 100 tablets $0.271 AB3 Availability likely —
Metformin Hydrochloride 500 mg 68180-0338-01 Lupin 100 tablets $0.271 AB3 Availability likely —
Metformin Hydrochloride 500 mg 70010-0496-01 Granules 100 tablets $0.271 AB3 Availability likely —
Metformin hydrochloride 500 mg 27241-0240-01 Ajanta 100 tablets $0.271 AB3 Availability likely —
Metformin Hydrochloride 500 mg 68462-0520-01 GLENMARK 100 tablets $0.271 AB3 Availability likely —
Metformin hydrochloride 500 mg 68682-0021-50 Oceanside 100 tablets $0.402 — FDA listed —
Glumetza 500 mg 68012-0004-50 Santarus, 100 tablets $49.542 — FDA listed —
Metformin Hydrochloride 500 mg 00615-8289-39 NCS 30 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 10135-0823-05 Marlex 500 tablets — AB1 FDA listed —
Metformin Hydrochloride Extended-Release 500mg 500 mg 17224-0311-28 Calvin 28 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 25000-0101-03 MARKSANS 30 tablets — AB1 FDA listed —
Metformin hydrochloride 500 mg 42291-0825-10 AvKARE 1000 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 42708-0201-60 QPharma 60 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 50090-1494-00 A-S 60 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 50090-5396-00 A-S 60 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 50090-5397-00 A-S 90 tablets — AB1 FDA listed —
Metformin 500 mg 50090-6515-00 A-S 60 tablets — AB1 FDA listed —
Metformin 500 mg 50090-6516-00 A-S 90 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 50090-7116-00 A-S 90 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 50090-7576-00 A-S 60 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 50090-7577-00 A-S 90 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 50090-7579-00 A-S 90 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 50090-7918-00 A-S 90 tablets — AB1 FDA listed —
Metformin Hydrochloride Extended Release 500 mg 51655-0555-96 Northwind 180 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 51655-0559-25 Northwind 60 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 51655-0853-25 Northwind 60 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 59651-0548-25 Aurobindo 25000 tablets — AB1 FDA listed —
Metformin ER 500 mg 62207-0491-31 Granules 5000 tablets — AB1 FDA listed —
Metformin hydrochloride 500 mg 63187-0779-00 Proficient 100 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 65162-0178-03 Amneal 30 tablets — — FDA listed —
Metformin Hydrochloride 500 mg 65841-0027-01 Zydus 100 tablets — AB1 Discontinued —
Metformin Hydrochloride 500 mg 65841-0809-01 Zydus 100 tablets — AB FDA listed —
Metformin 500 mg 67046-0437-03 Coupler 30 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 67296-1701-06 RedPharm 60 tablets — AB1 FDA listed —
Metformin Hydrochloride Extended Release 500 mg 68071-3111-02 NuCare 120 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 68788-8814-01 Preferred 100 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 68788-8866-01 Preferred 100 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 68788-8903-01 Preferred 100 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 69238-2125-01 Amneal 100 tablets — — FDA listed —
Metformin 500 mg 70518-4370-00 REMEDYREPACK 30 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 71205-0186-20 Proficient 20 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 71205-0686-30 Proficient 30 tablets — AB1 FDA listed —
Metformin Hydrochloride Extended Release 500 mg 71335-0293-01 Bryant 60 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 71335-0720-01 Bryant 60 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 71335-0886-01 Bryant 60 tablets — AB1 FDA listed —
Metformin 500 mg 71335-2354-01 Bryant 60 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 71335-2568-01 Bryant 60 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 71335-9683-01 Bryant 60 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 71610-0447-30 Aphena 30 tablets — — FDA listed —
Metformin Hydrochloride Extended Release 500 mg 71610-0454-30 Aphena 30 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 71610-0533-30 Aphena 30 tablets — AB1 FDA listed —
Metformin hydrochloride 500 mgthis 71610-0554-92 Aphena 270 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 71610-0578-60 Aphena 90 tablets — AB1 FDA listed —
Metformin hydrochloride 500 mg 71610-0587-30 Aphena 30 tablets — AB1 FDA listed —
Metformin 500 mg 71610-0613-60 Aphena 90 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 71610-0652-30 Aphena 30 tablets — — FDA listed —
Metformin Hydrochloride 500 mg 71610-0837-30 Aphena 30 tablets — AB1 FDA listed —
Metformin hydrochloride 500 mg 71610-0858-30 Aphena 30 tablets — AB1 FDA listed —
Metformin 500 mg 72162-2424-00 Bryant 1000 tablets — AB1 FDA listed —
Metformin Hydrochloride Extended Release 500 mg 72189-0064-30 direct 30 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 72189-0150-30 direct 30 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 72578-0035-01 Viona 100 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 72664-0227-01 VGYAAN 100 tablets — — FDA listed —
Metformin Hydrochloride Extended Release 500 mg 72789-0009-30 PD-Rx 30 tablets — AB1 FDA listed —
Metformin hydrochloride 500 mg 72789-0105-01 PD-Rx 100 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 72789-0400-01 PD-Rx 100 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 72789-0454-60 PD-Rx 60 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 72789-0455-30 PD-Rx 30 tablets — AB1 FDA listed —
Metformin hydrochloride 500 mg 76385-0128-01 UNICHEM 100 tablets — AB1 FDA listed —
Metformin 500 mg 82804-0147-30 Proficient 30 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 82804-0195-60 Proficient 60 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 43547-0503-10 Solco 100 tablets — AB3 FDA listed —
Metformin Hydrochloride 500 mg 47335-0305-18 Sun 1000 tablets — — Discontinued —
Glumetza 500 mg 68012-0002-13 Santarus, 100 tablets — — FDA listed —
Metformin Hydrochloride 500 mg 68180-0336-01 Lupin 100 tablets — AB2 FDA listed —
Metformin Hydrochloride 500 mg 62207-0496-47 Granules 500 tablets — AB3 FDA listed —
Metformin hydrochloride 500 mg 68071-1419-02 NuCare 20 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 71335-3166-01 Bryant 60 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 67296-2305-09 Redpharm 90 tablets — AB1 FDA listed —
Metformin Hydrochloride 500 mg 70518-4639-00 REMEDYREPACK 1 tablet — AB1 FDA listed —
About this product: this is a generic version of the medicine. FDA equivalence ratings are shown when available, and other versions are listed above, least expensive first.
Where does this data come from?
Equivalents are other NDCs of the same ingredient, form and route from the openFDA NDC Directory, ranked least-expensive-first by NADAC. Therapeutic-equivalence (AB) ratings come from the FDA Orange Book; biologics use the FDA Purple Book for biosimilar & interchangeable status.

Availability & generic status

🏛️
2018
On the market since
Jul 2018
📍
2026
Currently FDA-listed
8 years listed
🔓
·
Generic on the market
this product is a generic
✅This is a generic drug

This product is an FDA-approved generic. Other versions of the same drug are listed under Therapeutic equivalents, least expensive first.

Where does this data come from?
Patents and exclusivity from the FDA Orange Book (small-molecule drugs), refreshed from public FDA data. Generic launch timing is an estimate, not a guarantee.

What it looks like

Color white
ShapeRound
ImprintB115
Size13 mm
ScoringNot scored
One label can cover several strengths, so colors may be combined — always confirm a loose pill against the dispensed prescription label or a pharmacist.
Where does this data come from?
Physical description (imprint, shape, color, scoring, coating) from this product’s FDA Structured Product Labeling (SPL), mirrored from DailyMed / openFDA.

Inactive Ingredients / Excipients

Inactive ingredients, also called excipients, are components of the drug product other than the active ingredient. They may include fillers, dyes, coatings, preservatives, flavors, or other formulation ingredients.

🧪 Avoiding an ingredient? See Metformin inactive ingredients by manufacturer: every current product's list side by side, so you can ask your pharmacy for the version that does not list it.

💡 Tap an ingredient (hover on desktop) to see what it is and why it’s used.

  • UNII K679OBS311
    Carboxymethylcellulose sodium is a plant-derived thickening agent made from cellulose. In medicines, it acts as a binder to hold ingredients together, a disintegrant to help the tablet break apart, or a thickener in liquids.
  • UNII OP1R32D61U
    Microcrystalline cellulose is a purified form of cellulose, a natural fiber from plant sources. It acts as a binder and filler in tablets and capsules, helping hold ingredients together and give the medicine its shape and size.
  • UNII 3NXW29V3WO
    Hypromellose is a plant-based thickener made from cellulose. It's used in medicines as a binder to hold ingredients together, a coating for tablets, and a thickener for liquids.
  • UNII 70097M6I30
    Magnesium stearate is a salt made from magnesium and stearic acid, a fatty substance. It's used in tablets and capsules as a lubricant and glidant to help ingredients flow smoothly during manufacturing and prevent sticking.
  • UNII U725QWY32X
    Povidone K30 is a synthetic polymer made from petroleum. It acts as a binder to hold tablet ingredients together and as a disintegrant to help the tablet break apart in the stomach so the medicine can be absorbed.

5 inactive ingredients listed in the exact product block matched to this NDC.

Where does this data come from?
Data sourced from official FDA Structured Product Labeling (SPL) via DailyMed — ingredient classCode="IACT" elements from the exact product block matched by this NDC. Label-section narrative from DailyMed / the openFDA label index is shown separately when available.

Inactive ingredient FAQ

Are inactive ingredients the same for every manufacturer?
No. Inactive ingredients can differ by manufacturer, dosage form, strength, and package / product version.
Why might an inactive ingredient be missing?
Some SPLs do not provide a complete structured inactive-ingredient list, and older or unusual labels may only include the information in narrative text.
Can inactive ingredients matter?
Yes. They can matter for allergies, intolerances, dyes, gluten / lactose concerns, preservatives, and formulation differences — but confirm with a pharmacist or the manufacturer when it’s clinically important.

Manufacturer & labeler

LabelerAphena Pharma Solutions - Tennessee, LLC
Application holderREGCON HOLDINGS LLC
FDA applicationANDA207427 (ANDA)
Labeler code71610
First marketedJul 2018
Product typeHuman Prescription Drug
Portfolio800 products on file

More NDCs from Aphena Pharma Solutions - Tennessee, LLC labeler code 71610

The labeler markets the product; the application holder owns the FDA approval. They’re often the same company but can differ (e.g. a repackager or an authorized generic). A mailing address / phone appears here when the manufacturer includes it in the product’s FDA label (not all do).
Where does this data come from?
Labeler, application holder and registered establishment from the FDA openFDA NDC Directory and Drugs@FDA; address/contact from the product’s FDA label.

Full prescribing information FDA SPL

The complete FDA label for this product — the official prescribing information, verbatim, section by section. Very long sections are excerpted here and marked; the full text is on DailyMed (linked in the sources below). Jump with a chip, search within the label, or expand everything.
🚨 Boxed Warning 🎯 Indications and Usage ⏱️ Dosage and Administration ⛔ Contraindications 🤒 Adverse Reactions 🔄 Drug Interactions 🤰 Pregnancy 🧒 Pediatric Use 🧓 Geriatric Use 🆘 Overdosage 🧬 Clinical Pharmacology 🧬 Mechanism of Action 📦 How Supplied / Storage and Handling 📦 Storage and Handling 📋 Description 💬 Information for Patients ⚠️ Precautions 🍼 Nursing Mothers 🧬 Pharmacokinetics 🔬 Clinical Studies 📄 Carcinogenesis, Mutagenesis, Impairment of Fertility 📄 Patient Package Insert 📄 Package Label / Principal Display Panel
🚨 Boxed Warning ~3 min read ▾

WARNINGS Lactic Acidosis: Lactic acidosis is a rare, but serious, metabolic complication that can occur due to metformin accumulation during treatment with Metformin Hydrochloride; when it occurs, it is fatal in approximately 50% of cases. Lactic acidosis may also occur in association with a number of pathophysiologic conditions, including diabetes mellitus, and whenever there is significant tissue hypoperfusion and hypoxemia. Lactic acidosis is characterized by elevated blood lactate levels (>5 mmol/L), decreased blood pH, electrolyte disturbances with an increased anion gap, and an increased lactate/pyruvate ratio.

When metformin is implicated as the cause of lactic acidosis, metformin plasma levels >5 μg/mL are generally found. The reported incidence of lactic acidosis in patients receiving metformin Hydrochloride is very low (approximately 0.03 cases/1000 patient-years, with approximately 0.015 fatal cases/1000 patientyears). In more than 20,000 patient-years exposure to metformin in clinical trials, there were no reports of lactic acidosis.

Reported cases have occurred primarily in diabetic patients with significant renal insufficiency, including both intrinsic renal disease and renal hypoperfusion, often in the setting of multiple concomitant medical/surgical problems and multiple concomitant medications. Patients with congestive heart failure requiring pharmacologic management, in particular those with unstable or acute congestive heart failure who are at risk of hypoperfusion and hypoxemia, are at increased risk of lactic acidosis. The risk of lactic acidosis increases with the degree of renal dysfunction and the patient's age.

The risk of lactic acidosis may, therefore, be significantly decreased by regular monitoring of renal function in patients taking Metformin Hydrochloride by use of the minimum effective dose of Metformin Hydrochloride. In particular, treatment of the elderly should be accompanied by careful monitoring of renal function. Metformin Hydrochloride treatment should not be initiated in patients ≥80 years of age unless measurement of creatinine clearance demonstrates that renal function is not reduced, as these patients are more susceptible to developing lactic acidosis.

In addition, Metformin Hydrochloride should be promptly withheld in the presence of any condition associated with hypoxemia, dehydration, or sepsis. Because impaired hepatic function may significantly limit the ability to clear lactate, Metformin Hydrochloride should generally be avoided in patients with clinical or laboratory evidence of hepatic disease. Patients should be cautioned against excessive alcohol intake, either acute or chronic, when taking Metformin Hydrochloride, since alcohol potentiates the effects of metformin Hydrochloride on lactate metabolism.

In addition, Metformin Hydrochloride should be temporarily discontinued prior to any intravascular radiocontrast study and for any surgical procedure (see also PRECAUTIONS ). The onset of lactic acidosis often is subtle, and accompanied only by nonspecific symptoms such as malaise, myalgias, respiratory distress, increasing somnolence, and nonspecific abdominal distress. There may be associated hypothermia, hypotension, and resistant bradyarrhythmias with more marked acidosis.

The patient and the patient's physician must be aware of the possible importance of such symptoms and the patient should be instructed to notify the physician immediately if they occur (see also PRECAUTIONS ). Metformin Hydrochloride should be withdrawn until the situation is clarified. Serum electrolytes, ketones, blood glucose, and if indicated, blood pH, lactate levels, and even blood metformin levels may be useful.

Once a patient is stabilized on any dose level of Metformin Hydrochloride, gastrointestinal symptoms, which are common during initiation of therapy, are unlikely to be drug related. Later occurrence of gastrointestinal symptoms could be due to lactic acidosis or other serious disease. Lev… [Excerpted — this section continues on DailyMed.]

🎯 Indications and Usage 27 words ▾

INDICATIONS AND USAGE Metformin Hydrochloride Extended-release Tablets is indicated as an adjunct to diet and exercise to improve glycemic control in adults with type 2 diabetes mellitus.

⏱️ Dosage and Administration ~1 min read ▾

DOSAGE AND ADMINISTRATION There is no fixed dosage regimen for the management of hyperglycemia in patients with type 2 diabetes with Metformin Hydrochloride Extended-release Tablets or any other pharmacologic agent. Dosage of Metformin Hydrochloride Extended-release Tablets must be individualized on the basis of both effectiveness and tolerance, while not exceeding the maximum recommended daily doses. The maximum recommended daily dose of Metformin Hydrochloride Extended-release Tablets in adults is 2000 mg.

Metformin Hydrochloride Extended-release Tablets should generally be given once daily with the evening meal. Metformin Hydrochloride Extended-release Tablets should be started at a low dose, with gradual dose escalation, both to reduce gastrointestinal side effects and to permit identification of the minimum dose required for adequate glycemic control of the patient. During treatment initiation and dose titration (see Recommended Dosing Schedule ), fasting plasma glucose should be used to determine the therapeutic response to Metformin Hydrochloride Extended-release Tablets and identify the minimum effective dose for the patient.

Thereafter, glycosylated hemoglobin should be measured at intervals of approximately 3 months. The therapeutic goal should be to decrease both fasting plasma glucose and glycosylated hemoglobin levels to normal or near normal by using the lowest effective dose of Metformin Hydrochloride Extended-release Tablets either when used as monotherapy or in combination with sulfonylurea or insulin. Monitoring of blood glucose and glycosylated hemoglobin will also permit detection of primary failure, i.e., inadequate lowering of blood glucose at the maximum recommended dose of medication, and secondary failure, i.e., loss of an adequate blood glucose lowering response after an initial period of effectiveness.

Short-term administration of Metformin Hydrochloride Extended-release Tablets may be sufficient during periods of transient loss of control in patients usually well-controlled on diet alone. Metformin Hydrochloride Extended-release Tablets must be swallowed whole and never crushed or chewed. Occasionally, the inactive ingredients of Metformin Hydrochloride Extended-release Tablets will be eliminated in the feces as a soft, hydrated mass.

(See Patient Information printed below.)

⛔ Contraindications 110 words ▾

CONTRAINDICATIONS Metformin Hydrochloride is contraindicated in patients with: Renal disease or renal dysfunction (e.g., as suggested by serum creatinine levels ≥1.5 mg/dL [males], ≥1.4 mg/dL [females] or abnormal creatinine clearance) which may also result from conditions such as cardiovascular collapse (shock), acute myocardial infarction, and septicemia (see WARNINGS and PRECAUTIONS ). Known hypersensitivity to Metformin Hydrochloride. Acute or chronic metabolic acidosis, including diabetic ketoacidosis, with or without coma.

Diabetic ketoacidosis should be treated with insulin. Metformin Hydrochloride should be temporarily discontinued in patients undergoing radiologic studies involving intravascular administration of iodinated contrast materials, because use of such products may result in acute alteration of renal function. (See also PRECAUTIONS. )

🤒 Adverse Reactions ~2 min read ▾

ADVERSE REACTIONS In a US double-blind clinical study of Metformin Hydrochloride Tablets in patients with type 2 diabetes, a total of 141patients received Metformin Hydrochloride Tablets therapy (up to 2550 mg per day) and 145 patients received placebo.Adverse reactions reported in greater than 5% of the Metformin Hydrochloride Tablets patients, and that were more common in Metformin Hydrochloride Tablets - than placebo-treated patients, are listed in Table 11. . Table 11: Most Common Adverse Reactions (>5.0 Percent) in Placebo-Controlled Studies of Metformin Hydrochloride Tablets Monotherapy Reactions that were more common in metformin Hydrochloride Extended-release Tablets - than placebo-treated patients.

Metformin Hydrochloride Extended-release Tablets Monotherapy n=141) Placebo (n=145) Adverse Reaction % of Patients Diarrhea 53.2

11.7Nausea/Vomiting 25.5

8.3Flatulance 12.1

5.5Asthenia 9.2

5.5Indigestion 7.1

4.1Abdominal Discomfort 6.4

4.8Headache 5.7

4.8Diarrhea led to discontinuation of study medication in 6% of patients treated with Metformin Hydrochloride Tablets. Additionally, the following adverse reactions were reported in ≥1.0% to ≤5.0% of Metformin Hydrochloride Tablets patients and were more commonly reported with Metformin Hydrochloride Tablets than placebo: abnormal stools, hypoglycemia, myalgia, lightheaded, dyspnea, nail disorder, rash, sweating increased, taste disorder,chest discomfort, chills, flu syndrome, flushing, palpitation. In worldwide clinical trials over 900 patients with type 2 diabetes have been treated with Metformin Hydrochloride Extended-release Tablets in placebo- and active-controlled studies.

In placebo-controlled trials, 781 patients were administered Metformin Hydrochloride Extended-release Tablets and 195 patients received placebo. Adverse reactions reported in greater than 5% of the Metformin Hydrochloride Extended-release Tablets patients, and that were more common in Metformin Hydrochloride Extended-release Tablets - than placebo-treated patients, are listed in Table 12. Table 12: Most Common Adverse Reactions (>5.0 Percent) in Placebo-Controlled Studies of Metformin Hydrochloride Extended-release Tablets Reactions that were more common in metformin Hydrochloride Extended-release Tablets - than placebo-treated patients.

Metformin Hydrochloride Extended-release Tablets n=781) Placebo (n=195) Adverse Reaction % of Patients Diarrhea 9.6

2.6Nausea/Vomiting 6.5

1.5Diarrhea led to discontinuation of study medication in 0.6% of patients treated with Metformin Hydrochloride Extended-release Tablets. Additionally, the following adverse reactions were reported in ≥1.0% to ≤5.0% of Metformin Hydrochloride Extended-release Tablets patients and were more commonly reported with Metformin Hydrochloride Extended-release Tablets than placebo: abdominal pain, constipation, distention abdomen, dyspepsia/heartburn, flatulence, dizziness, headache, upper respiratory infection, taste disturbance.

Liver function test abnormalities or hepatitis, resolving upon metformin discontinuation, have been reported very rarely.

🔄 Drug Interactions ~2 min read ▾

Drug Interactions (Clinical Evaluation of Drug Interactions Conducted with Metformin Hydrochloride Tablets) Glyburide - In a single-dose interaction study in type 2 diabetes patients, coadministration of metformin and glyburide did not result in any changes in either metformin pharmacokinetics or pharmacodynamics. Decreases in glyburide AUC and C max were observed, but were highly variable. The single-dose nature of this study and the lack of correlation between glyburide blood levels and pharmacodynamic effects, makes the clinical significance of this interaction uncertain (see DOSAGE AND ADMINISTRATION: Concomitant Metformin Hydrochloride and Oral Sulfonylurea Therapy in Adult Patients ).

Furosemide - A single-dose, metformin-furosemide drug interaction study in healthy subjects demonstrated that pharmacokinetic parameters of both compounds were affected by coadministration. Furosemide increased the metformin plasma and blood C max by 22% and blood AUC by 15%, without any significant change in metformin renal clearance. When administered with metformin, the C max and AUC of furosemide were 31% and 12% smaller, respectively, than when administered alone, and the terminal half-life was decreased by 32%, without any significant change in furosemide renal clearance.

No information is available about the interaction of metformin and furosemide when coadministered chronically. Nifedipine - A single-dose, metformin-nifedipine drug interaction study in normal healthy volunteers demonstrated that coadministration of nifedipine increased plasma metformin C max and AUC by 20% and 9%, respectively, and increased the amount excreted in the urine. T max and half-life were unaffected.

Nifedipine appears to enhance the absorption of metformin. Metformin had minimal effects on nifedipine. Cationic drugs - Cationic drugs (e.g., amiloride, digoxin, morphine, procainamide, quinidine, quinine, ranitidine, triamterene, trimethoprim, or vancomycin) that are eliminated by renal tubular secretion theoretically have the potential for interaction with metformin by competing for common renal tubular transport systems.

Such interaction between metformin and oral cimetidine has been observed in normal healthy volunteers in both single- and multiple-dose, metformin-cimetidine drug interaction studies, with a 60% increase in peak metformin plasma and whole blood concentrations and a 40% increase in plasma and whole blood metformin AUC. There was no change in elimination half-life in the single-dose study. Metformin had no effect on cimetidine pharmacokinetics.

Although such interactions remain theoretical (except for cimetidine), careful patient monitoring and dose adjustment of metformin hydrochloride and/or the interfering drug is recommended in patients who are taking cationic medications that are excreted via the proximal renal tubular secretory system. Other - Certain drugs tend to produce hyperglycemia and may lead to loss of glycemic control. These drugs include the thiazides and other diuretics, corticosteroids, phenothiazines, thyroid products, estrogens, oral contraceptives, phenytoin, nicotinic acid, sympathomimetics, calcium channel blocking drugs, and isoniazid.

When such drugs are administered to a patient receiving metformin hydrochloride, the patient should be closely observed for loss of blood glucose control. When such drugs are withdrawn from a patient receiving metformin hydrochloride, the patient should be observed closely for hypoglycemia. In healthy volunteers, the pharmacokinetics of metformin and propranolol, and metformin and ibuprofen were not affected when coadministered in single-dose interaction studies.

Metformin is negligibly bound to plasma proteins and is, therefore, less likely to interact with highly protein-bound drugs such as salicylates, sulfonamides, chloramphenicol, and probenecid, as compared to the sulfonylureas, which are extensively bound to serum proteins.

🤰 Pregnancy 133 words ▾

Pregnancy Teratogenic Effects Recent information strongly suggests that abnormal blood glucose levels during pregnancy are associated with a higher incidence of congenital abnormalities. Most experts recommend that insulin be used during pregnancy to maintain blood glucose levels as close to normal as possible. Because animal reproduction studies are not always predictive of human response, metformin hydrochloride should not be used during pregnancy unless clearly needed.

There are no adequate and well-controlled studies in pregnant women with metformin hydrochloride. Metformin was not teratogenic in rats and rabbits at doses up to 600 mg/kg/day. This represents an exposure of about two and six times the maximum recommended human daily dose of 2000 mg based on body surface area comparisons for rats and rabbits, respectively.

Determination of fetal concentrations demonstrated a partial placental barrier to metformin.

🧒 Pediatric Use 159 words ▾

Pediatric Use The safety and effectiveness of Metformin Hydrochloride Tablets for the treatment of type 2 diabetes have been established in pediatric patients ages 10 to 16 years (studies have not been conducted in pediatric patients below the age of 10 years). Use of Metformin Hydrochloride Tablets in this age group is supported by evidence from adequate and well-controlled studies of Metformin Hydrochloride Tablets in adults with additional data from a controlled clinical study in pediatric patients ages 10 to 16 years with type 2 diabetes, which demonstrated a similar response in glycemic control to that seen in adults.

(See CLINICAL PHARMACOLOGY: Pediatric Clinical Studies .) In this study, adverse effects were similar to those described in adults. (See ADVERSE REACTIONS: Pediatric Patients .) A maximum daily dose of 2000 mg is recommended. (See DOSAGE AND ADMINISTRATION: Recommended Dosing Schedule: Pediatrics .) Safety and effectiveness of Metformin Hydrochloride Extended - Release Tablets in pediatric patients have not been established.

🧓 Geriatric Use 153 words ▾

Geriatric Use Controlled clinical studies of metformin hydrochloride did not include sufficient numbers of elderly patients to determine whether they respond differently from younger patients, although other reported clinical experience has not identified differences in responses between the elderly and younger patients. Metformin is known to be substantially excreted by the kidney and because the risk of serious adverse reactions to the drug is greater in patients with impaired renal function, metformin hydrochloride should only be used in patients with normal renal function (see CONTRAINDICATIONS, WARNINGS , and CLINICAL PHARMACOLOGY: Pharmacokinetics ).

Because aging is associated with reduced renal function, metformin Hydrochloride Extended-release Tablets should be used with caution as age increases. Care should be taken in dose selection and should be based on careful and regular monitoring of renal function. Generally, elderly patients should not be titrated to the maximum dose of metformin hydrochloride (see also WARNINGS and DOSAGE AND ADMINISTRATION ).

🆘 Overdosage 81 words ▾

OVERDOSAGE Overdose of metformin hydrochloride has occurred, including ingestion of amounts greater than 50 grams. Hypoglycemia was reported in approximately 10% of cases, but no causal association with metformin Hydrochloride has been established. Lactic acidosis has been reported in approximately 32% of metformin overdose cases (see WARNINGS ).

Metformin is dialyzable with a clearance of up to 170 mL/min under good hemodynamic conditions. Therefore, hemodialysis may be useful for removal of accumulated drug from patients in whom metformin overdosage is suspected.

🧬 Clinical Pharmacology 110 words ▾

CLINICAL PHARMACOLOGY Mechanism of Action Metformin is an antihyperglycemic agent which improves glucose tolerance in patients with type 2 diabetes, lowering both basal and postprandial plasma glucose. Its pharmacologic mechanisms of action are different from other classes of oral antihyperglycemic agents. Metformin decreases hepatic glucose production, decreases intestinal absorption of glucose, and improves insulin sensitivity by increasing peripheral glucose uptake and utilization.

Unlike sulfonylureas, metformin does not produce hypoglycemia in either patients with type 2 diabetes or normal subjects (except in special circumstances, see PRECAUTIONS ) and does not cause hyperinsulinemia. With metformin therapy, insulin secretion remains unchanged while fasting insulin levels and day-long plasma insulin response may actually decrease.

🧬 Mechanism of Action 108 words ▾

Mechanism of Action Metformin is an antihyperglycemic agent which improves glucose tolerance in patients with type 2 diabetes, lowering both basal and postprandial plasma glucose. Its pharmacologic mechanisms of action are different from other classes of oral antihyperglycemic agents. Metformin decreases hepatic glucose production, decreases intestinal absorption of glucose, and improves insulin sensitivity by increasing peripheral glucose uptake and utilization.

Unlike sulfonylureas, metformin does not produce hypoglycemia in either patients with type 2 diabetes or normal subjects (except in special circumstances, see PRECAUTIONS ) and does not cause hyperinsulinemia. With metformin therapy, insulin secretion remains unchanged while fasting insulin levels and day-long plasma insulin response may actually decrease.

📦 How Supplied / Storage and Handling 131 words ▾

HOW SUPPLIED Metformin Hydrochloride Extended-release TabletsUSP are available as follows: 500 mg Bottles of 90 NDC 72789-105-90 500 mg Bottles of 100 NDC 72789-105-01 500 mg Bottles of 180 NDC 72789-105-93 500 mg Bottles of 500 NDC 72789-105-82 500 mg Bottles of 1000 NDC 72789-105-95 750 mg Bottles of 90 NDC 72789-106-90 750 mg Bottles of 100 NDC 72789-106-01 750 mg Bottles of 180 NDC 72789-106-93 750 mg Bottles of 500 NDC 72789-106-82 750 mg Bottles of 1000 NDC 72789-106-95 Metformin Hydrochloride Extended-release Tablets USP, 500 mg are white to off-white color, round, biconvex tablet, having B115 on one side and plain on the other.

Metformin Hydrochloride Extended-release Tablets USP, 750 mg are white to off-white color, capsule shape, biconvex tablet, having B116 on one side and plain on the other.

📦 Storage and Handling 31 words ▾

Storage Store at 20° - 25° C (68° - 77° F); excursions permitted to 15° - 30° C (59° - 86° F). [See USP Controlled Room Temperature.] Dispense in light-resistant containers.

📋 Description ~1 min read ▾

DESCRIPTION Metformin Hydrochloride Extended-release Tablets USP are oral antihyperglycemic drugs used in the management of type 2 diabetes. Metformin Hydrochloride (N,N-dimethylimidodicarbonimidic diamide Hydrochloride) is not chemically or pharmacologically related to any other classes of oral antihyperglycemic agents. The structural formula is as shown: Metformin Hydrochloride is a white to off-white crystalline compound with a molecular formula of C 4 H 11 N 5 • HCl and a molecular weight of 165.63.

Metformin Hydrochloride is freely soluble in water and is practically insoluble in acetone, ether, and chloroform. The pK a of metformin is 12.4. The pH of a 1% aqueous solution of metformin Hydrochloride is 6.68.

Metformin Hydrochloride Extended-release Tablets USP contain 500 mg or 750 mg of Metformin Hydrochloride USP as the active ingredient. Metformin Hydrochloride Extended-release Tablets USP 500 mg and 750 mg contain the inactive ingredients microcrystalline cellulose, hypromellose, povidone, sodium carboxymethyl cellulose, and magnesium stearate. System Components and Performance- Metformin Hydrochloride Extended-release Tablets USP comprises a duel hydrophilic polymer matrix system.

Metformin hydrochloride is combined with a drug release controlling polymers to form a monophasic matrix system. After administration, fluid from the gastrointestinal (GI) tract enters the tablet, causing the polymers to hydrate and swell. Drug is released slowly from the dosage form by a process of diffusion through the gel matrix that is essentially independent of pH.

The hydrated polymer system is not rigid and is expected to be broken up by normal peristalsis in the GI tract. The biologically inert components of the tablet may occasionally remain intact during GI transit and will be eliminated in the feces as a soft, hydrated mass. The USP Dissolution Test is pending. structure

💬 Information for Patients ~1 min read ▾

Information for Patients Patients should be informed of the potential risks and benefits of metformin hydrochloride and of alternative modes of therapy. They should also be informed about the importance of adherence to dietary instructions, of a regular exercise program, and of regular testing of blood glucose, glycosylated hemoglobin, renal function, and hematologic parameters. The risks of lactic acidosis, its symptoms, and conditions that predispose to its development, as noted in the WARNINGS and PRECAUTIONS sections, should be explained to patients.

Patients should be advised to discontinue metformin hydrochloride immediately and to promptly notify their health practitioner if unexplained hyperventilation, myalgia, malaise, unusual somnolence, or other nonspecific symptoms occur. Once a patient is stabilized on any dose level of metformin hydrochloride, gastrointestinal symptoms, which are common during initiation of metformin therapy, are unlikely to be drug related. Later occurrence of gastrointestinal symptoms could be due to lactic acidosis or other serious disease.

Patients should be counselled against excessive alcohol intake, either acute or chronic, while receiving metformin hydrochloride. Metformin hydrochloride alone does not usually cause hypoglycemia, although it may occur when metformin hydrochloride are used in conjunction with oral sulfonylureas and insulin. When initiating combination therapy, the risks of hypoglycemia, its symptoms and treatment, and conditions that predispose to its development should be explained to patients and responsible family members.

(See Patient Information printed below.) Patients should be informed that metformin Hydrochloride Extended-release Tablets must be swallowed whole and not crushed or chewed, and that the inactive ingredients may occasionally be eliminated in the feces as a soft mass that may resemble the original tablet.

⚠️ Precautions ~3 min read ▾

PRECAUTIONS General Macrovascular Outcomes - There have been no clinical studies establishing conclusive evidence of macrovascular risk reduction with metformin hydrochloride or any other antidiabetic drug. Monitoring of renal function - Metformin is known to be substantially excreted by the kidney, and the risk of metformin accumulation and lactic acidosis increases with the degree of impairment of renal function. Thus, patients with serum creatinine levels above the upper limit of normal for their age should not receive metformin hydrochloride.

In patients with advanced age, metformin hydrochloride should be carefully titrated to establish the minimum dose for adequate glycemic effect, because aging is associated with reduced renal function. In elderly patients, particularly those ≥80 years of age, renal function should be monitored regularly and, generally, metformin Hydrochloride Extended-release Tablets should not be titrated to the maximum dose (see WARNINGS and DOSAGE AND ADMINISTRATION ). Before initiation of metformin hydrochloride therapy and at least annually hereafter, renal function should be assessed and verified as normal.

In patients in whom development of renal dysfunction is anticipated, renal function should be assessed more frequently and metformin hydrochloride discontinued if evidence of renal impairment is present. Use of concomitant medications that may affect renal function or metformin disposition - Concomitant medication(s) that may affect renal function or result in significant hemodynamic change or may interfere with the disposition of metformin, such as cationic drugs that are eliminated by renal tubular secretion (see PRECAUTIONS: Drug Interactions ), should be used with caution.

Radiologic studies involving the use of intravascular iodinated contrast materials (for example, intravenous urogram, intravenous cholangiography, angiography, and computed tomography (CT) scans with intravascular contrast materials) - Intravascular contrast studies with iodinated materials can lead to acute alteration of renal function and have been associated with lactic acidosis in patients receiving metformin (see CONTRAINDICATIONS ). Therefore, in patients in whom any such study is planned, metformin hydrochloride should be temporarily discontinued at the time of or prior to the procedure, and withheld for 48 hours subsequent to the procedure and reinstituted only after renal function has been re-evaluated and found to be normal.

Hypoxic states - Cardiovascular collapse (shock) from whatever cause, acute congestive heart failure, acute myocardial infarction and other conditions characterized by hypoxemia have been associated with lactic acidosis and may also cause prerenal azotemia. When such events occur in patients on metformin hydrochloride therapy, the drug should be promptly discontinued. Surgical procedures - Metformin hydrochloride therapy should be temporarily suspended for any surgical procedure (except minor procedures not associated with restricted intake of food and fluids) and should not be restarted until the patient's oral intake has resumed and renal function has been evaluated as normal.

Alcohol intake - Alcohol is known to potentiate the effect of metformin on lactate metabolism. Patients, therefore, should be warned against excessive alcohol intake, acute or chronic, while receiving metformin hydrochloride. Impaired hepatic function - Since impaired hepatic function has been associated with some cases of lactic acidosis, metformin hydrochloride should generally be avoided in patients with clinical or laboratory evidence of hepatic disease.

Vitamin B 12 levels - In controlled clinical trials of metformin Hydrochloride Tablets of 29 weeks duration, a decrease to subnormal levels of previously normal serum vitamin B 12 levels, without clinical manifestations, was observed in approximately 7% of patients. Such decrease, possibly due to interference with B 12 absorption from the B 12 -intrinsic factor… [Excerpted — this section continues on DailyMed.]

🍼 Nursing Mothers 85 words ▾

Nursing Mothers Studies in lactating rats show that metformin is excreted into milk and reaches levels comparable to those in plasma. Similar studies have not been conducted in nursing mothers. Because the potential for hypoglycemia in nursing infants may exist, a decision should be made whether to discontinue nursing or to discontinue the drug, taking into account the importance of the drug to the mother.

If metformin hydrochloride are discontinued, and if diet alone is inadequate for controlling blood glucose, insulin therapy should be considered.

🧬 Pharmacokinetics ~2 min read ▾

Pharmacokinetics Absorption and Bioavailability The absolute bioavailability of a Metformin Hydrochloride 500 mg tablet given under fasting conditions is approximately 50% to 60%. Studies using single oral doses of Metformin Hydrochloride 500 to 1500 mg, and 850 to 2550 mg, indicate that there is a lack of dose proportionality with increasing doses, which is due to decreased absorption rather than an alteration in elimination. Food decreases the extent of and slightly delays the absorption of metformin, as shown by approximately a 40% lower mean peak plasma concentration (C max ), a 25% lower area under the plasma concentration versus time curve (AUC), and a 35-minute prolongation of time to peak plasma concentration (T max ) following administration of a single 850 mg tablet of metformin with food, compared to the same tablet strength administered fasting.

The clinical relevance of these decreases is unknown. Following a single oral dose of Metformin Hydrochloride Extended-release tablet, C max is achieved with a median value of 7 hours and a range of 4 to 8 hours. Peak plasma levels are approximately 20% lower compared to the same dose of Metformin Hydrochloride tablet, however, the extent of absorption (as measured by AUC) is similar to Metformin Hydrochloride tablet.

At steady state, the AUC and C max are less than dose proportional for Metformin Hydrochloride Extended-release Tablets within the range of 500 to 2000 mg administered once daily. Peak plasma levels are approximately 0.6, 1.1, 1.4, and 1.8 mcg/mL for 500, 1000, 1500, and 2000 mg once-daily doses, respectively. The extent of metformin absorption (as measured by AUC) from Metformin Hydrochloride Extended-release tablet at a 2000 mg once-daily dose is similar to the same total daily dose administered as Metformin Hydrochloride Tablets 1000 mg twice daily.

After repeated administration of Metformin Hydrochloride Extended-release Tablets, metformin did not accumulate in plasma. Within-subject variability in C max and AUC of metformin from Metformin Hydrochloride Extended-release Tablets is comparable to that with Metformin Hydrochloride Tablets. Although the extent of metformin absorption (as measured by AUC) from the Metformin Hydrochloride Extended-release Tablets increased by approximately 50% when given with food, there was no effect of food on C max and T max of metformin.

Both high and low fat meals had the same effect on the pharmacokinetics of Metformin Hydrochloride Extended-release Tablets.

🔬 Clinical Studies ~3 min read ▾

Clinical Studies Metformin Hydrochloride Tablets In a double-blind, placebo-controlled, multicenter US clinical trial involving obese patients with type 2 diabetes whose hyperglycemia was not adequately controlled with dietary management alone (baseline fasting plasma glucose [FPG] of approximately 240 mg/dL), treatment with Metformin Hydrochloride Tablets (up to 2550 mg/day) for 29 weeks resulted in significant mean net reductions in fasting and postprandial plasma glucose (PPG) and hemoglobin A1c (HbA1c) of 59 mg/dL, 83 mg/dL, and 1.8%, respectively, compared to the placebo group (see Table 2 ).

Table 2. Metformin vs Placebo Summary of Mean Changes from Baseline All patients on diet therapy at Baseline in Fasting Plasma Glucose, HbA1c and Body Weight, at Final Visit (29-week study) Metformin Hydrochloride Tablets (n=141) Placebo (n=145) p–Value FPG (mg/dL) Baseline Change at FINAL VISIT 241.5 -53.0 237.7

6.3NS Not statistically significant 0.001 Hemoglobin A 1c (%) Baseline Change at FINAL VISIT 8.4 -1.4 8.2

0.4NS 0.001 Body Weight (lbs) Baseline Change at FINAL VISIT 201.0 -1.4 206.0 -2.4 NS NS A 29-week, double-blind, placebo-controlled study of Metformin Hydrochloride Tablets and glyburide, alone and in combination, was conducted in obese patients with type 2 diabetes who had failed to achieve adequate glycemic control while on maximumdoses of glyburide (baseline FPG of approximately 250 mg/dL) (see Table 3). Patients randomized to the combination armstarted therapy with Metformin Hydrochloride Tablets 500 mgand glyburide 20 mg.

At the end of each week of the first 4 weeks of the trial, these patients had theirdosages of Metformin Hydrochloride Tablets increased by 500 mg if they had failed to reach target fasting plasma glucose. After week 4, such dosage adjustments were made monthly, although no patient was allowed toexceed Metformin Hydrochloride Tablets 2500 mg. Patients in the Metformin Hydrochloride Tablets only arm(metformin plus placebo) followed the same titration schedule.

At the end of the trial, approximately 70% of the patients in the combination group were taking Metformin Hydrochloride Tablets 2000 mg/glyburide 20 mg or Metformin Hydrochloride Tablets 2500 mg/glyburide 20 mg. Patients randomized to continue on glyburide experienced worsening of glycemiccontrol, with mean increases in FPG, PPG, and HbA1c of 14 mg/dL, 3 mg/dL, and 0.2%, respectively. Incontrast, those randomized to Metformin Hydrochloride Tablets (up to 2500 mg/day) experienced a slight improvement, with mean reductions in FPG, PPG, and HbA1c of 1 mg/dL, 6 mg/dL, and 0.4%, respectively.

The combination of Metformin Hydrochloride Tablets and glyburide was effective in reducing FPG, PPG, and HbA1c levels by 63 mg/dL, 65 mg/dL, and 1.7%, respectively. Compared to results of glyburide treatment alone, the net differences with combination treatment were –77 mg/dL, –68 mg/dL, and –1.9%, respectively (see Table 3 ). Table 3.

Combined Metformin Hydrochloride Tablets /Glyburide (Comb) vs Glyburide (Glyb) or Metformin Hydrochloride Tablets (Met) Monotherapy: Summary of Mean Changes from Baseline All patients on glyburide, 20 mg/day, at Baseline in Fasting Plasma Glucose, HbA 1c and Body Weight, at Final Visit (29-week study) p-values Comb (n=213) Glyb (n=209) MET (n=210) Glyb vs Comb MET vs Comb MET vs Glyb Fasting Plasma Glucose (mg/dL) Baseline Change at FINAL VISIT 250.5 -63.5 247.5 13.7 253.9 -0.9 NS Not statistically significant 0.001 NS 0.001 NS 0.025 Hemoglobin A 1c (%) Baseline Change at FINAL VISIT 8.8 -1.7 8.5 0.2 8.9 -0.4 NS 0.001 NS 0.001 0.007 0.001 Body Weight (lbs) Baseline Change at FINAL VISIT 202.2 0.9 203.0 -0.7 204.0 -8.4 NS 0.011 NS 0.001 NS 0.001 The magnitude of the decline in fasting blood glucose concentration following the institution of Metformin Hydrochloride Tablets therapy was proportional to the level of fasting hyperglycemia.

Patients withtype 2 diabetes with higher fasting glucose concentrations experienced greater de… [Excerpted — this section continues on DailyMed.]

📄 Carcinogenesis, Mutagenesis, Impairment of Fertility 184 words ▾

Carcinogenesis, Mutagenesis, Impairment of Fertility Long-term carcinogenicity studies have been performed in rats (dosing duration of 104 weeks) and mice (dosing duration of 91 weeks) at doses up to and including 900 mg/kg/day and 1500 mg/kg/day, respectively. These doses are both approximately four times the maximum recommended human daily dose of 2000 mg based on body surface area comparisons. No evidence of carcinogenicity with metformin was found in either male or female mice.

Similarly, there was no tumorigenic potential observed with metformin in male rats. There was, however, an increased incidence of benign stromal uterine polyps in female rats treated with 900 mg/kg/day. There was no evidence of a mutagenic potential of metformin in the following in vitro tests: Ames test ( S. typhimurium ), gene mutation test (mouse lymphoma cells), or chromosomal aberrations test (human lymphocytes).

Results in the in vivo mouse micronucleus test were also negative. Fertility of male or female rats was unaffected by metformin when administered at doses as high as 600 mg/kg/day, which is approximately three times the maximum recommended human daily dose based on body surface area comparisons.

📄 Patient Package Insert ~3 min read ▾

PATIENT INFORMATION Rx only Metformin ER Tablets (Metformin Hydrochloride) Extended-release Tablets USP, 500 mg and 750 mg Read this information carefully before you start taking this medicine and each time you refill your prescription. There may be new information. This information does not take the place of your doctor’s advice.

Ask your doctor or pharmacist if you do not understand some of this information or if you want to know more about this medicine. What is Metformin Hydrochloride? Metformin Hydrochloride is used to treat type 2 diabetes.

This is also known as non-insulin-dependent diabetes mellitus. People with type 2 diabetes are not able to make enough insulin or respond normally to the insulin their bodies make. When this happens, sugar (glucose) builds up in the blood.

This can lead to serious medical problems including kidney damage, amputations, and blindness. Diabetes is also closely linked to heart disease. The main goal of treating diabetes is to lower your blood sugar to a normal level.

High blood sugar can be lowered by diet and exercise, by a number of medicines taken by mouth, and by insulin shots. Before you take Metformin Hydrochloride, try to control your diabetes by exercise and weight loss. While you take your diabetes medicine, continue to exercise and follow the diet advised for your diabetes.

No matter what your recommended diabetes management plan is, studies have shown that maintaining good blood sugar control can prevent or delay complications of diabetes, such as blindness. This medicine helps control your blood sugar in a number of ways. These include helping your body respond better to the insulin it makes naturally, decreasing the amount of sugar your liver makes, and decreasing the amount of sugar your intestines absorb.

Metformin Hydrochloride does not cause your body to make more insulin. Because of this, when taken alone, they rarely cause hypoglycemia (low blood sugar), and usually do not cause weight gain. However, when they are taken with a sulfonylurea or with insulin, hypoglycemia is more likely to occur, as is weight gain.

WARNING: A small number of people who have taken Metformin Hydrochloride have developed a serious condition called lactic acidosis. Lactic acidosis is caused by a buildup of lactic acid in the blood. This happens more often in people with kidney problems.

Most people with kidney problems should not take Metformin Hydrochloride. (See " What are the side effects of Metformin Hydrochloride? ") Who should not take Metformin Hydrochloride? Some conditions increase your chance of getting lactic acidosis, or cause other problems if you take either of these medicines.

Most of the conditions listed below can increase your chance of getting lactic acidosis. Do not take Metformin Hydrochloride if you: have kidney problems have liver problems have heart failure that is treated with medicines, such as digoxin or furosemide drink a lot of alcohol. This means you binge drink for short periods or drink all the time are seriously dehydrated (have lost a lot of water from your body) are going to have an x-ray procedure with injection of dyes (contrast agents) are going to have surgery develop a serious condition, such as heart attack, severe infection, or a stroke are 80 years or older and you have NOT had your kidney function tested Tell your doctor if you are pregnant or plan to become pregnant.

Metformin Hydrochloride may not be right for you. Talk with your doctor about your choices. You should also discuss your choices with your doctor if you are nursing a child.

Can Metformin Hydrochloride Extended-release Tablets USP be used in children? Metformin Hydrochloride Extended-release Tablets USP have not been studied in children. How should I take Metformin Hydrochloride?

Your doctor will tell you how much medicine to take and when to take it. You will probably start out with a low dose of the medicine. Your doctor may slowly increase your dose until your blood sugar is better c… [Excerpted — this section continues on DailyMed.]

📄 Package Label / Principal Display Panel 22 words ▾

PRINCIPAL DISPLAY PANEL - 500 mg NDC 71610-554 - Metformin HCl ER, USP 500mg Tablets - Rx Only Bottle Label 500 mg

Source: FDA Structured Product Labeling, mirrored from DailyMed / openFDA. Prefer the government’s original formatting? View this label on DailyMed ↗

About this NDC listing & data coverage

Finished prescription product
What data is (and isn’t) available for this NDC — tap to expand
NDC identity (package / product / labeler codes) ✓ Available
Labeler ✓ Available
Product & package description ✓ Available
Marketing category & status ✓ Available
Active ingredient / dosage form / route ✓ Available
FDA label (SPL via DailyMed) ✓ Available
Package photos ✓ Available
Inactive ingredients (structured) ✓ Available
NADAC pharmacy acquisition price (CMS) — Not published for this NDC CMS publishes NADAC only for NDCs reported in its retail-pharmacy survey.
Orange Book / therapeutic-equivalence data ✓ Available
HCPCS J-code billing crosswalk — Not published for this NDC Most self-administered / retail products have no J-code — that is normal.
Medicaid utilization (CMS SDUD) — Not published for this NDC CMS reports utilization only for NDCs with Medicaid claims above its privacy threshold.
“Not published” reflects what the public FDA / CMS / NLM sources provide for this exact package code — it is a property of the data feeds, not a judgment about the product.

Questions about this listing

Why is there no price listed?
The pricing shown on our NDC pages comes from CMS NADAC, a voluntary survey of retail community pharmacy invoices. CMS does not publish a NADAC for every NDC — packages outside the retail survey (institutional and hospital products, bulk packages, discontinued items, and many OTC items) may never receive one. A missing price reflects the survey's scope, not this product's actual cost, and does not mean the product is free or unavailable.
Is the NDC printed on the package the same as the 11-digit billing NDC?
Yes, they identify this exact package in different formats. The form printed on the packaging and shown on DailyMed is the one the FDA registered. Insurance claims use a fixed 11-digit 5-4-2 format, so the short segment is padded with a leading zero and the dashes are dropped. The Identity section at the top of this page lists each form of this code.
Is this package still being marketed?
Yes, per the latest FDA NDC Directory data on this page: this package is listed as actively marketed, with no marketing end date reported by Aphena Pharma Solutions - Tennessee, LLC. Listing status can change — the directory data on this page refreshes weekly.
Does this product come in other package sizes?
Yes — the FDA directory lists 6 other package presentations of this same product, including 30 tablets (71610-0554-30), 60 tablets (71610-0554-53), 90 tablets (71610-0554-60). Each has its own NDC and its own page — see the package list near the top of this page.
Who lists this product with the FDA?
Aphena Pharma Solutions - Tennessee, LLC is the labeler of record for this NDC — the company under whose FDA-assigned code the package is listed. The labeler may be the manufacturer itself or a distributor marketing the product under its own code.
Do I need a prescription for this product?
This NDC is listed with FDA as a prescription product, so it is dispensed under a prescriber's order. Your pharmacist can tell you whether any over-the-counter forms of the same medication exist.
This page identifies an FDA-listed package (the NDC) and reports public regulatory and pricing data about the listing. It is reference information, not a medical recommendation — talk to your pharmacist or prescriber about your own medication.
Where does this data come from?
Listing facts (marketing category, packager status, marketing dates) from the FDA openFDA NDC Directory; label availability from DailyMed; pricing coverage from CMS NADAC; equivalence scope from the FDA Orange Book.
← 71610-0552-04 · Aphena 71610-0555-45 · Aphena →
For educational and professional reference only — not medical advice. Pricing reflects published NADAC and CMS ASP (free public data) and may differ from your acquisition cost; always verify before billing or dispensing.