Fiber Lax Calcium Polycarbophil 625 mg Tablet, Film Coated, 500-count
by Rugby Laboratories · 500 TABLET, FILM COATED in 1 BOTTLE (0536-4306-05)
NDC 00536-4306-05
🏷️ FDA NDC (as labeled)
0536-4306-05
billing pads the labeler segment with a zero
This package
Also priced by: Medicaid pays $0.1708/unit — full pricing hub ↓
OTC
On market
Non-controlled
🗂️ Data synced Jul 24, 2026 · sources: openFDA · FDA label (DailyMed) · FDA Orange & Purple Book · First Databank · CMS NADAC, ASP, Medicare & Medicaid · RxNorm
📋 All sources & update times →
🆔 Identity & classification
FDA NDC (as labeled)
0536-4306-05
Product NDC
0536-4306
11-digit billing NDC
00536430605
NCPDP billing unit
EA — each (per item)
RxCUI
308934
UNII
8F049NKY49
UPC
0305364306059
Application #
M007
SPL Set ID
318d81ed-0b06-4d21-8b97-2d1f0267c781
DEA schedule
Non-controlled
Marketing category
OTC MONOGRAPH DRUG
Marketing status
On market
FDA listing status
Listed (active directory)
Marketing start
2010-09-01
Route
ORAL
Dosage form
TABLET, FILM COATED
Substance
CALCIUM POLYCARBOPHIL
GPI-14
46300020100310
GPI class
Fiber-Lax
GCN Seq No
003065
GCN
08342
HICL code
001346
Ingredient (HICL)
Calcium Polycarbophil
HIC1 code
D
Therapeutic class — broad (HIC1)
Biliary System/Gastro-Intestinal System
HIC2 code
D6
Therapeutic class — intermediate (HIC2)
Drugs Acting Principally On The Colon
HIC3 code
D6S
Therapeutic class — specific (HIC3)
Laxatives And Cathartics
AHFS code
56:12.00.00
AHFS class
Cathartics And Laxatives
FDB label name
FIBER-LAX 625 MG CAPLET
FDB brand name
Fiber-Lax
Legend status
O — Over-the-counter (OTC) drug or device
Why two NDCs?
The FDA registers this code as 0536-4306-05 — a 4-4-2 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 labeler segment → 00536-4306-05. 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 Bulk-forming laxatives class.
Drug family (ATC)
Bulk-forming laxatives
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.
🏭 Manufacturer & labeler
LabelerRugby Laboratories
FDA applicationM007 (OTC MONOGRAPH DRUG)
Labeler code00536
First marketedSep 2010
Product typeHuman Otc Drug
Portfolio149 products on file
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.
🩺 Clinical
Label name FIBER-LAX 625 MG CAPLET Ingredient Calcium Polycarbophil
🧪 What is this product?
Fiber Lax is an over-the-counter oral tablet containing calcium polycarbophil, a bulk-forming fiber supplement. This product is an OTC monograph drug, meaning it is marketed under FDA's established rules for its category without individual application review. Calcium polycarbophil is typically used to absorb water in the intestines and add bulk to stool, functions commonly sought for occasional constipation relief or to promote regular bowel movements.
Patient education
Supplement & herbal interactions
Some supplements/herbs that may interact with Calcium Polycarbophil — tap one for details:
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.
💬 Questions about Calcium Polycarbophil?
Ask a pharmacist →
Ask a licensed pharmacist directly — free, answered by our team.
💊 What it looks like
Color
white
ShapeOval
ImprintCPC;339
Size19 mm
ScoringScored — splits in 2
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.
💡 Tap an ingredient (hover on desktop) to see what it is and why it’s used.
-
UNII T9D99G2B1R
Caramel is a brown coloring substance made by heating sugar. It's added to medicines to give them color and sometimes a slight sweet taste without affecting how the drug works.
-
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 2S7830E561
Crospovidone is a synthetic polymer derived from povidone. It acts as a disintegrant, helping the tablet or capsule break apart quickly in the stomach so the active ingredient can be absorbed.
-
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 N6K5787QVP
Light mineral oil is a clear, odorless liquid derived from petroleum. In medicines, it acts as a lubricant and emollient to help the product spread smoothly and improve texture.
-
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 B697894SGQ
Polyethylene glycol 400 is a clear, thick liquid made from petroleum-derived polymers. It acts as a solvent and humectant in medicines, helping dissolve active ingredients and retain moisture in the formulation.
-
UNII ETJ7Z6XBU4
Silicon dioxide is a naturally occurring mineral used as a glidant and anti-caking agent. It helps powder ingredients flow smoothly and prevents clumping during manufacturing and storage.
-
UNII 368GB5141J
A detergent and foaming agent derived from coconut or palm oil. In medications, it helps break down and mix oil and water-based ingredients, aids in tablet disintegration, and improves how the drug dissolves and spreads in the mouth or digestive system.
-
UNII 4ELV7Z65AP
Stearic acid is a fatty acid derived from plant or animal sources. It acts as a binder and lubricant in tablets and capsules, helping them hold together and flow smoothly during manufacturing.
-
UNII 7SEV7J4R1U
A powder made from a naturally occurring mineral. In medicines, talc works as a glidant and anti-caking agent, helping tablets and capsules flow smoothly during manufacturing and preventing clumping.
11 inactive ingredients listed in the exact product block matched to this NDC.
The official label also statescaramel, crospovidone, hypromellose, magnesium stearate, microcrystalline cellulose, mineral oil, polyethylene glycol, silicon dioxide, sodium lauryl sulfate, stearic acid, and talc
Label-section wording can be broader than the structured product block and may mention additional formulation ingredients.
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.
💲 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 system | Per ea | Per package |
|---|---|---|
| Retail pharmacies payNADAC · weekly | $0.058 | $29.20 / 500 tablets |
| Medicaid paysCMS SDUD · 12 mo | $0.1708 | $85.40 / 500 tablets |
| Medicare drug plans payPart D · quarterly | No Part D plan price is available for this NDC in our data. | |
NADAC price history (per ea) — tap or hover for the price & month
▲ Up 5% over the last 24 months.
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.
🔁 Therapeutic equivalents
| Product | Labeler | Pack | NADAC/unit | TE | Status | Price vs. this |
|---|---|---|---|---|---|---|
| Fiber Lax 625 mgthis 00536-4306-05 | Rugby | 500 tablets | $0.058 | — | Availability likely | — |
| Fiber Tabs 625 mg 00904-2500-91 | Major | 90 tablets | $0.058 | — | Availability likely | — |
| Calcium Polycarbophil 625 mg 70000-0067-01 | LEADER/ | 250 tablets | $0.058 | — | Availability likely | — |
| Foster and Thrive Fiber Laxative 147 625 mg 70677-1083-01 | Strategic | 90 tablets | $0.058 | — | Availability likely | — |
| Fiber caplets 147 625 mg 83324-0131-90 | Chain | 90 tablets | $0.058 | — | Availability likely | — |
| Walgreen Fiber Lax 625 mg 00363-0120-14 | WALGREENS | 140 tablets | — | — | FDA listed | — |
| up and up fiber therapy 625 mg 11673-0620-90 | Target | 140 tablets | — | — | FDA listed | — |
| Rite Aid Fiber Caplets 625 mg 11822-2025-00 | RITE | 250 tablets | — | — | FDA listed | — |
| Fiber Caplets 625 mg 21130-0021-40 | SAFEWAY | 140 tablets | — | — | FDA listed | — |
| Good Neighbor Pharmacy Fiber-Caps Fiber Laxative Stimulant Free 625 mg 24385-0125-27 | Amerisourcebergen | 90 capsules | — | — | FDA listed | — |
| Fiber Caplets 625 mg 30142-0132-14 | THE | 140 tablets | — | — | FDA listed | — |
| Fiber Laxative 625 mg 36800-0465-27 | Topco | 90 tablets | — | — | FDA listed | — |
| Fiber Laxative 625 mg 41163-0147-94 | UNITED | 140 tablets | — | — | FDA listed | — |
| Publix 625 mg 41415-0021-90 | PUBLIX | 90 tablets | — | — | FDA listed | — |
| Fiber Therapy 625 mg 49035-0147-94 | Wal-Mart | 140 tablets | — | — | FDA listed | — |
| Goodsense Fiber laxative 147 625 mg 50804-0147-94 | GoodSense | 140 tablets | — | — | FDA listed | — |
| Fiber Caps 625 mg 53041-0147-27 | Guardian | 90 tablets | — | — | FDA listed | — |
| Fiber laxative 625 mg 53943-0147-27 | Discount | 90 tablets | — | — | FDA listed | — |
| Fiber Laxative 625 mg 54257-0379-07 | Magno-Humphries, | 90 tablets | — | — | FDA listed | — |
| Fiber Laxative 625 mg 54257-0479-07 | Magno-Humphries, | 90 tablets | — | — | FDA listed | — |
| Fiber Lax 625 mg 55289-0949-30 | PD-Rx | 30 tablets | — | — | FDA listed | — |
| Fiber Laxative 625 mg 57896-0459-09 | Geri-Care | 90 tablets | — | — | FDA listed | — |
| Calcium Polycarbophil 625 mg 58624-5003-01 | SHANDONG | 90 tablets | — | — | FDA listed | — |
| Quality Choice 625 mg 63868-0530-90 | QUALITY | 90 tablets | — | — | FDA listed | — |
| Best Choice 625 mg 63941-0023-90 | BEST | 90 tablets | — | — | FDA listed | — |
| Premier Value 625 mg 68016-0220-25 | PHARMACY | 250 tablets | — | — | FDA listed | — |
| Calcium Polycarbophil 625 mg 69842-0846-02 | CVS | 250 tablets | — | — | FDA listed | — |
| Calcium Polycarbophil 625 mg 70369-0006-08 | CITRAGEN | 120 tablets | — | — | FDA listed | — |
| Amazon Fiber Caplets 625 mg 72288-0201-40 | AMAZON.COM | 140 tablets | — | — | FDA listed | — |
| Fiber Laxative Caplets 625 mg 77333-0120-50 | Gendose | 50 tablets | — | — | FDA listed | — |
| Meijer Fiber Caplets 625 mg 79481-1205-00 | MEIJER | 250 tablets | — | — | FDA listed | — |
| Fibercon 625 mg 80070-0500-14 | Foundation | 140 tablets | — | — | FDA listed | — |
| Quality Choice Fiber Caplets 625 mg 83324-0276-14 | QUALITY | 140 tablets | — | — | FDA listed | — |
| Equalactin Laxative 625 mg 69846-0000-26 | NUMARK | 24 tablets | — | — | Discontinued | — |
| Fibercon 625 mg 63029-0170-14 | Medtech | 140 tablets | — | — | FDA listed | — |
About this product: other versions of the same ingredient, strength and form are listed above, least expensive first, with FDA equivalence ratings where available.
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
🏛️
2010
On the market since
Sep 2010
📍
2026
Currently FDA-listed
16 years listed
🔒
·
No generic listed yet
brand only
ℹ️No FDA-approved generic found
We did not find an FDA-approved generic match for this exact strength, form and route.
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.
🗺️ Medicaid utilization & spend
📍 This exact package only: Medicaid data is reported per full 11-digit NDC — labeler, product and pack size — so every number here is for 00536-4306-05, not the drug overall. Other pack sizes report separately.
💊 Pharmacy benefit only: These are Medicaid outpatient pharmacy claims, billed by NDC. They exclude the medical benefit — clinic- or hospital-administered drugs billed under HCPCS J-codes — so drugs used mostly that way (e.g. Avastin, Lucentis, Keytruda) can look low or missing here. That’s expected, not an error.
📅 Q1 2025 – Q1 2026 · 5 quarters of data
ⓘ The newest quarter is usually incomplete when first published; states restate recent quarters in later CMS releases, so the latest figures typically revise upward. State coverage-policy changes can also shift quarter-to-quarter totals.
Prescriptions last 4 qtrs
68K
Units reimbursed last 4 qtrs
3.8M
Gross reimbursed last 4 qtrs
$648.2K
Avg / prescription
$9.53
Avg / unit
$0.1708
Latest quarter Q1 2026
15.3KRx
Medicaid pays / ea
$0.1708
gross reimbursed
vs
NADAC / ea
$0.0584
acquisition cost
=
Spread
+$0.1124
+192% vs cost
What Medicaid paid per ea (before rebates; includes the pharmacy’s dispensing fee) compared with NADAC — the average price pharmacies pay to buy the drug. A positive spread means Medicaid reimbursed more than the purchase price, before manufacturer rebates.
Fee-for-service vs managed care ⓘ
Fee-for-service · 41,243 Rx Managed care · 26,803 Rx
State Medicaid map
Units reimbursed · per 100k residents
25.58,195
gray = no data reported ⓘ
Colors are per 100,000 residents, so big states don’t automatically dominate. Tap or hover a state for its actual totals.
Tap or hover a state
…for its Medicaid breakdown
Prescriptions—
Units—
Reimbursed—
🏆 Top states by units · per 100k residents
National units — by quarter
💵 About the dollar figures: “reimbursed” is what Medicaid paid pharmacies before confidential manufacturer rebates, so the program’s real net cost is lower than these numbers. Fee-for-service and managed-care claims are combined unless split above. Source: CMS State Drug Utilization Data; per-100k rates use 2023 Census population estimates.
💊 Medicaid utilization by pack size
Medicaid (SDUD) totals over the four most recent reported quarters for every package size of this drug — handy when a specific package (e.g. a starter/titration pack) carries little or no Medicaid volume on its own.
Drug total (last 4 qtrs): 93,033 Rx · 5,327,662 units · $875,035 gross reimbursed
Tap a pack size to open its page. Source: CMS State Drug Utilization Data, last 4 quarters.
🔬 Reported adverse events (FAERS)
Read carefully: FAERS reports are voluntary and unverified. Counts are not incidence, do not establish causation, are subject to reporting bias, and cannot be used to compare one drug to another. Shown for signal context only. Reports for Fiber Lax (this brand).
Top reported reactions
Reporter sex
Male · 40%
Female · 60%
Serious outcomes
Reports over time (by year) — tap or hover for the count & year
Most recent year is provisional (FAERS lags ~3 months).
Where does this data come from?
Adverse-event reports from the FDA Adverse Event Reporting System (FAERS) via openFDA. FAERS reports are voluntary and unverified — counts are not incidence and don’t establish causation.
📦 Packaging — all sizes for this product
| Package NDC | Description | Per unit | Per pack | Marketing start | Status |
|---|---|---|---|---|---|
| 00536-4306-05 You're viewing this | 500 TABLET, FILM COATED in 1 BOTTLE (0536-4306-05) | $0.0584 / ea | $29.19 | 2010-09-01 | Active |
| 00536-4306-08 | 2 BLISTER PACK in 1 CARTON (0536-4306-08) / 30 TABLET, FILM COATED in 1 BLISTER PACK | $0.0584 / ea | $3.50 | 2010-09-01 | Active |
| 00536-4306-11 | 90 TABLET, FILM COATED in 1 BOTTLE (0536-4306-11) | $0.0584 / ea | $5.25 | 2010-09-01 | Active |
This pack has the lowest per-ea cost of the 3 priced pack sizes ($0.0584 NADAC).
In Medicaid, this is the most-dispensed pack of this product — about 73% of fills over the last four reported quarters. See all packs ↓
Pack size FAQ
What quantity is in NDC 00536-4306-05?
NDC 00536-4306-05 is a 500-count package — 500 tablet, film coated in 1 bottle.
What is the difference between NDC 00536-4306-05 and NDC 00536-4306-11?
Both are Fiber Lax Calcium Polycarbophil 625 mg Tablet, Film Coated — the drug itself is identical. NDC 00536-4306-05 is the 500-count package, while NDC 00536-4306-11 is the 90 tablets package.
What NDC number is used to bill for this package of Fiber Lax Calcium Polycarbophil 625 mg Tablet, Film Coated?
Bill NDC 00536-4306-05 — the 11-digit billing format is 00536430605. Pharmacy and medical claims use the 11-digit form; the FDA label may print a shorter form of the same code.
Prices are the latest CMS NADAC pharmacy acquisition cost per NDC; per-pack figures are per-unit × pack quantity, shown only when the pack is denominated in the same measure NADAC prices.
📄 FDA label — Drug Facts FDA SPL
The complete FDA label for this product — the official Drug Facts labeling, verbatim, section by section. Jump with a chip, search within the label, or expand everything.
🎯 Indications and Usage
⏱️ Dosage and Administration
⚠️ Warnings
🆘 Overdosage
🧪 Active Ingredient
🧪 Inactive Ingredients
🎯 Purpose
🎯 Indications and Usage ▾
Uses relieves occasional constipation (irregularity) generally produces bowel movement in 12 to 72 hours
⏱️ Dosage and Administration ▾
Directions • take each dose of this product with a full glass of water (8oz.) or other fluid. Taking this product without enough liquid may cause choking. See choking warning. adults and children 12 years of age and over 2 caplets, 1 to 4 times per day children under 12 years of age ask a doctor
⚠️ Warnings ▾
Warnings Choking: Taking this product without adequate fluid may cause it to swell and block your throat or esophagus and may cause choking. Do not take this product if you have difficulty in swallowing. If you experience chest pain, vomiting, or difficulty in swallowing or breathing after taking this product, seek immediate medical attention.
Ask a doctor before use if you have abdominal pain, nausea, or vomiting a sudden change in bowel habits that persists over a period of 2 weeks Ask a doctor or pharmacist before use if you are taking any other drug. Take Fiber-Lax two or more hours before or after other drugs. All laxatives may affect how other drugs work.
When using this product • do not use for more than 7 days unless directed by a doctor • do not take more than 8 caplets in a 24-hour period unless directed by a doctor. Stop use and ask a doctor if you fail to have a bowel movement after use or have rectal bleeding. These could be signs of a serious condition.
Keep out of reach of children. In case of overdose, get medical help or contact a Poison Control Center (1-800-222-1222) right away.
🆘 Overdosage ▾
In case of overdose, get medical help or contact a Poison Control Center (1-800-222-1222) right away.
🧪 Active Ingredient ▾
Drug Facts Active ingredient (in each caplet) Calcium polycarbophil 625 mg (equivalent to polycarbophil 500 mg)
🧪 Inactive Ingredients ▾
Inactive ingredients caramel, crospovidone, hypromellose, magnesium stearate, microcrystalline cellulose, mineral oil, polyethylene glycol, silicon dioxide, sodium lauryl sulfate, stearic acid, and talc
🎯 Purpose ▾
Purpose Bulk-forming laxative
No label section mentions that — try another word, or open the full label on DailyMed below.
Source: FDA Structured Product Labeling, mirrored from DailyMed / openFDA.
Prefer the government’s original formatting? View this label on DailyMed ↗
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.