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Metronidazole 10 mg/g Gel — NDC 51672-4164-09 package photo
Label image from the product's FDA listing (DailyMed) — may show a different pack size or an older label revision.

Metronidazole 10 mg/g Gel — NDC 51672-4164-9 (Billing 51672-4164-09)

by Sun Pharmaceutical Industries, Inc. · 1 BOTTLE, PUMP in 1 CARTON / 55 g in 1 BOTTLE, PUMP

This is a package of Metronidazole 10 mg/g Gel from Sun Pharmaceutical Industries, Inc., no longer marketed (first marketed Mar 2017), no longer in the FDA NDC Directory; retail pharmacies pay about $0.5229 per g (NADAC).

NDC 51672-4164-09
🏷️ FDA NDC (as labeled) 51672-4164-9 billing pads the package segment with a zero
This package
Contains55 g in 1 bottle, pump Cost per g$0.5229 NADAC Per package$28.76 / 55 g Pack sizes3 compare ↓
Also priced by: Part D plans $1.40/unit — full pricing hub ↓
Product page 51672-4164-03 Also comes in: 60 g 51672-4164-3 45 g 51672-4164-6
Rx only Generic Discontinued Non-controlled ⚠ Discontinued by firm ⇄ 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 51672-4164-9 alone.

Record
FDA NDC Directory package listing · Human prescription drug
Code segments
51672 labeler · 4164 product · 9 package
Package marketed since
Aug 15, 2017
Sample package
No — commercial package
Listing certified through
Dec 31, 2027
Barcode (UPC-A, from the NDC)
3 5167241649 2
FDA record last changed
Jul 24, 2026
⚠️
Excluded from the active FDA NDC Directory. The labeler reported this product as discontinued, so it is excluded from the active NDC Directory. The listing was last certified through May 2019. A label may still appear on DailyMed, but the NDC is no longer in the current FDA NDC Directory. Search the FDA NDC Directory ↗

Identity & classification

Regulatory identifiers FDA, NLM and CMS codes for this package

FDA NDC (as labeled) 51672-4164-9
Product NDC 51672-4164
11-digit billing NDC 51672416409
NCPDP billing unit GM — per gram (weight)
RxCUI 577237
UNII 140QMO216E
Application # ANDA204651
SPL Set ID 5a504f74-bccd-433a-bd5b-6822f98c34df
Established class (EPC) Nitroimidazole Antimicrobial
Chemical class Nitroimidazoles
DEA schedule Non-controlled
Marketing category ANDA
Marketing status Discontinued
FDA listing status Discontinued by firm (certified through May 2019)
Marketing start 2017-03-14
Route TOPICAL
Dosage form GEL
Substance METRONIDAZOLE
TE code (Orange Book) AB · RLD · RS

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

GCN Seq No 068879
GCN 31774
HICL code 004157
Ingredient (HICL) Metronidazole
HIC1 code L
Therapeutic class — broad (HIC1) Skin/Subcutaneous Tissue
HIC2 code L5
Therapeutic class — intermediate (HIC2) Keratolytics/Keratoplastics
HIC3 code L5G
Therapeutic class — specific (HIC3) Rosacea Agents, Topical
AHFS code 08:30.04.00
AHFS class Amebicides
FDB label name METRONIDAZOLE TOP 1% GEL PUMP
FDB brand name Metronidazole
Legend status F — Federal legend — prescription drug or device
Quick answers
  • GSN (GCN sequence number): 068879
  • GCN: 31774
  • HICL (First Databank): 004157
  • AHFS class code: 08:30.04.00
  • RxCUI (RxNorm): 577237
Why two NDCs? The FDA registers this code as 51672-4164-9 — a 5-4-1 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 package segment → 51672-4164-09. 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 Nitroimidazole Antimicrobial class.

Pharmacologic class Nitroimidazole Antimicrobial
Drug family (ATC) Nitroimidazole derivatives, Antiinfectives and antiseptics for local oral treatment, Other chemotherapeutics
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 METRONIDAZOLE TOP 1% GEL PUMP Ingredient Metronidazole
📗 Our plain-language guide HelloPharmacist
  • It depends on the product. Oral forms treat trichomoniasis, and some also treat amebiasis and anaerobic infections. Vaginal gels treat bacterial vaginosis, and topical cream or lot...
  • No. Alcohol with oral metronidazole can cause cramps, nausea, vomiting, headache and flushing. Avoid alcohol and products with propylene glycol during treatment and for at least th...
  • The most common are nausea, headache, loss of appetite, vomiting, diarrhea and stomach cramps. A metallic taste is also common. Call your doctor if you notice numbness or tingling,...
  • Yes. Metronidazole can interact with warfarin, lithium, busulfan, disulfiram and drugs that affect heart rhythm. Some of these combinations need blood tests or should be avoided, s...
📖 Read our full Metronidazole guide →
7
Nutrient depletion considerations

Metronidazole may be associated with lower levels of 7 nutrients — worth a chat with your pharmacist, not a cause for alarm.

🧪 Full Metronidazole 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 gPer package
Retail pharmacies payNADAC · weekly $0.523 $28.76 / 55 g
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 $1.40 $76.73 / 55 g
NADAC price history (per g) — tap or hover for the price & month
Dec 2021 May 2022 Dec 2023 Feb 2026 $1.227 $0.521
▼ Down 45% over the last 16 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.

Packaging — all sizes for this product

Package NDCDescription Per unit Per pack Marketing startMarketing endStatus
51672-4164-03 51672-4164-3 Main listing 1 TUBE in 1 CARTON / 60 g in 1 TUBE $0.6724 / g $40.34 2017-03-14 — Discontinued by firm
51672-4164-06 51672-4164-6 1 TUBE in 1 CARTON / 45 g in 1 TUBE — — 2017-03-14 — Discontinued by firm
51672-4164-09 You're viewing this 1 BOTTLE, PUMP in 1 CARTON / 55 g in 1 BOTTLE, PUMP $0.5229 / g $28.76 2017-08-15 — Discontinued by firm

This pack has the lowest per-g cost of the 2 priced pack sizes ($0.5229 NADAC).

Pack size FAQ

What quantity is in this package?
This package is listed by the FDA — 1 bottle, pump in 1 carton / 55 g in 1 bottle, pump.
What NDC number is used to bill for this package of Metronidazole 10 mg/g Gel?
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.

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.

Therapeutic equivalents

ProductLabelerPackNADAC/unitTEStatusPrice vs. this
Metronidazole 10 mg/gthis 51672-4164-09 Sun 1 bottle $0.523 AB Discontinued —
Metronidazole 10 mg/g 68308-0663-55 Mayne 1 bottle $0.540 AB Availability likely +3%
Metronidazole 10 mg/g 00713-0574-60 Cosette 1 tube $0.621 AB Availability likely +19%
Metronidazole 10 mg/g 51672-4215-03 Sun 1 tube $0.621 AB Availability likely +19%
Metronidazole 10 mg/g 59651-0813-60 Aurobindo 1 tube $0.621 AB Availability likely +19%
metronidazole 10 mg/g 66993-0936-58 Prasco 55 g $0.866 AB Discontinued +66%
Metronidazole 10 mg/g 46708-0630-45 Alembic 1 tube — AB FDA listed —
Metronidazole 10 mg/g 62332-0630-45 Alembic 1 tube — AB 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

🏛️
2017
On the market since
Mar 2017
📍
2026
Currently FDA-listed
9 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 yellow
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 Metronidazole 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 3K9958V90M
    A liquid solvent derived from fermentation or chemical synthesis. In medicines, alcohol dissolves active ingredients, helps preserve the product, and improves how the body absorbs certain drugs.
  • UNII 7FLD91C86K
    Edetate disodium is a chemical compound that binds and removes certain metal ions. In medicines, it acts as a preservative and stabilizer by preventing metals like calcium from interfering with the product's shelf life and consistency.
  • UNII A2I8C7HI9T
    Methylparaben is a preservative derived from benzoic acid that prevents growth of bacteria, fungi, and mold in medicines. It extends the product's shelf life and maintains safety during storage.
  • UNII 3WJQ0SDW1A
    Polyethylene glycol is a synthetic liquid or solid polymer used in medicines as a solvent, lubricant, and humectant. It helps dissolve active ingredients, reduces friction during manufacturing, and retains moisture in the final product.
  • UNII 6DC9Q167V3
    Propylene glycol is a clear liquid derived from petroleum or vegetable sources. It acts as a solvent, humectant, and preservative in medicines, helping dissolve active ingredients and maintain product stability.
  • UNII Z8IX2SC1OH
    Propylparaben is a chemical preservative used to prevent bacterial and fungal growth in medicines and personal care products. It helps extend shelf life and maintain product safety during storage.
  • UNII 059QF0KO0R
    Water is a liquid solvent that dissolves and mixes ingredients together in liquid medicines, syrups, and injections. It helps distribute the active drug evenly throughout the product.

7 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

LabelerSun Pharmaceutical Industries, Inc.
Application holderTARO PHARMACEUTICAL INDUSTRIES LTD
FDA applicationANDA204651 (ANDA)
Labeler code51672
First marketedMar 2017
Product typeHuman Prescription Drug
Portfolio890 products on file

More NDCs from Sun Pharmaceutical Industries, Inc. labeler code 51672

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. Jump with a chip, search within the label, or expand everything.
🎯 Indications and Usage ⏱️ Dosage and Administration 💊 Dosage Forms and Strengths ⛔ Contraindications ⚠️ Warnings and Cautions 🤒 Adverse Reactions 🔄 Drug Interactions 👥 Use in Specific Populations 🤰 Pregnancy 🧒 Pediatric Use 🧓 Geriatric Use 🆘 Overdosage 🧬 Clinical Pharmacology 🧬 Mechanism of Action 📦 How Supplied / Storage and Handling 📦 Storage and Handling 📋 Description 💬 Information for Patients 🍼 Nursing Mothers 🧬 Pharmacokinetics 🧬 Pharmacodynamics 🔬 Clinical Studies 🧪 Nonclinical Toxicology 📄 Carcinogenesis, Mutagenesis, Impairment of Fertility 📄 Package Label / Principal Display Panel
🎯 Indications and Usage 39 words ▾

1 INDICATIONS AND USAGE Metronidazole Gel USP, 1% is indicated for the topical treatment of inflammatory lesions of rosacea. Metronidazole Gel USP, 1% is a nitroimidazole indicated for the topical treatment of inflammatory lesions of rosacea. ( 1 )

⏱️ Dosage and Administration 94 words ▾

2 DOSAGE AND ADMINISTRATION Apply and rub in a thin film of metronidazole once daily to affected area(s). A gentle cleanser should be used before the application of metronidazole. Cosmetics may be applied after the application of metronidazole.

Not for oral, ophthalmic or intravaginal use. Not for oral, ophthalmic or intravaginal use. Apply and rub in a thin film of metronidazole once daily to affected area(s).

( 2 ) Treated areas should be cleansed before the application of metronidazole. ( 2 ) Cosmetics may be applied after the application of metronidazole. ( 2 )

💊 Dosage Forms and Strengths 27 words ▾

3 DOSAGE FORMS AND STRENGTHS Gel, 1%. Metronidazole is a colorless to slightly yellow gel. Each gram of metronidazole contains 10 mg (1%) of metronidazole. Gel, 1%.

⛔ Contraindications 52 words ▾

4 CONTRAINDICATIONS Metronidazole Gel USP, 1% is contraindicated in patients with a history of hypersensitivity to metronidazole or to any other ingredient in the formulation. Metronidazole Gel USP, 1% is contraindicated in those patients with a history of hypersensitivity to metronidazole or to any other ingredient in this formulation. ( 4 )

⚠️ Warnings and Cautions ~1 min read ▾

5 WARNINGS AND PRECAUTIONS Peripheral neuropathy, characterized by numbness or paresthesia of an extremity has been reported in patients treated with systemic metronidazole. Although not evident in clinical trials for topical metronidazole, peripheral neuropathy has been reported with the post approval use. The appearance of abnormal neurologic signs should prompt immediate reevaluation of metronidazole therapy.

( 5.1 ) Metronidazole is a nitroimidazole and should be used with care in patients with evidence of, or history of, blood dyscrasia. ( 5.2 ) If dermatitis occurs, patients may need to discontinue use. ( 5.3 ) Topical metronidazole has been reported to cause tearing of the eyes.

Therefore, contact with the eyes should be avoided. ( 5.4 )

5.1Neurologic Disease Peripheral neuropathy, characterized by numbness or paresthesia of an extremity has been reported in patients treated with systemic metronidazole. Although not evident in clinical trials for topical metronidazole, peripheral neuropathy has been reported with the post approval use. The appearance of abnormal neurologic signs should prompt immediate reevaluation of metronidazole therapy.

Metronidazole should be administered with caution to patients with central nervous system diseases.

5.2Blood Dyscrasias Metronidazole is a nitroimidazole; use with care in patients with evidence of, or history of, blood dyscrasia.

5.3Contact Dermatitis Irritant and allergic contact dermatitis have been reported. If dermatitis occurs, patients may need to discontinue use.

5.4Eye Irritation Topical metronidazole has been reported to cause tearing of the eyes. Avoid contact with the eyes.

🤒 Adverse Reactions ~2 min read ▾

6 ADVERSE REACTIONS Most common adverse reactions (incidence > 2%) are nasopharyngitis, upper respiratory tract infection, and headache ( 6 ) To report SUSPECTED ADVERSE REACTIONS, contact Taro Pharmaceuticals U.S.A., Inc. at 1-866-923-4914 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

6.1Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. In a controlled clinical trial, 557 patients used metronidazole gel USP, 1% and 189 patients used the gel vehicle once daily for up to 10 weeks. The following table summarizes selected adverse reactions that occurred at a rate of ≥ 1%: Table 1: Adverse Reactions That Occurred at a Rate of ≥1% System Organ Class/Preferred Term Metronidazole Gel USP, 1% Gel Vehicle N=557 N=189 Patients with at least one AE Number (%) of Patients 186 (33.4) 51 (27.0) Infections and infestations 76 (13.6) 28 (14.8) Bronchitis 6 (1.1) 3 (1.6) Influenza 8 (1.4) 1 (0.5) Nasopharyngitis 17 (3.1) 8 (4.2) Sinusitis 8 (1.4) 3 (1.6) Upper respiratory tract infection 14 (2.5) 4 (2.1) Urinary tract infection 6 (1.1) 1 (0.5) Vaginal mycosis 1 (0.2) 2 (1.1) Musculoskeletal and connective tissue disorders 19 (3.4) 5 (2.6) Back pain 3 (0.5) 2 (1.1) Neoplasms 4 (0.7) 2 (1.1) Basal cell carcinoma 1 (0.2) 2 (1.1) Nervous system disorders 18 (3.2) 3 (1.6) Headache 12 (2.2) 1 (0.5) Respiratory, thoracic and mediastinal disorders 22 (3.9) 5 (2.6) Nasal congestion 6 (1.1) 3 (1.6) Skin and subcutaneous tissue disorders 36 (6.5) 12 (6.3) Contact dermatitis 7 (1.3) 1 (0.5) Dry skin 6 (1.1) 3 (1.6) Vascular disorders 8 (1.4) 1 (0.5) Hypertension 6 (1.1) 1 (0.5) Table 2: Local Cutaneous Signs and Symptoms of Irritation That Were Worse Than Baseline Metronidazole Gel USP, 1% Gel Vehicle Sign/Symptom N=544 N=184 Dryness 138 (25.4) 63 (34.2) Mild 93 (17.1) 41 (22.3) Moderate 42 (7.7) 20 (10.9) Severe 3 (0.6) 2 (1.1) Scaling 134 (24.6) 60 (32.6) Mild 88 (16.2) 32 (17.4) Moderate 43 (7.9) 27 (14.7) Severe 3 (0.6) 1 (0.5) Pruritus 86 (15.8) 35 (19.0) Mild 53 (9.7) 21 (11.4) Moderate 27 (5.0) 13 (7.1) Severe 6 (1.1) 1 (0.5) Stinging/burning 56 (10.3) 28 (15.2) Mild 39 (7.2) 18 (9.8) Moderate 7 (1.3) 9 (4.9) Severe 10 (1.8) 1 (0.5) The following additional adverse experiences have been reported with the topical use of metronidazole: skin irritation, transient redness, metallic taste, tingling or numbness of extremities, and nausea.

6.2Post Marketing Experience The following adverse reaction has been identified during post approval use of topical metronidazole: peripheral neuropathy. Because this reaction is reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate the frequency or establish a causal relationship to drug exposure.

🔄 Drug Interactions 114 words ▾

7 DRUG INTERACTIONS Oral metronidazole has been reported to potentiate the anticoagulant effect of coumarin and warfarin, resulting in a prolongation of prothrombin time. Drug interactions should be kept in mind when metronidazole is prescribed for patients who are receiving anticoagulant treatment, although they are less likely to occur with topical metronidazole administration because of low absorption. Oral metronidazole has been reported to potentiate the anticoagulant effect of coumarin and warfarin, resulting in a prolongation of prothrombin time.

Drug interactions should be kept in mind when metronidazole is prescribed for patients who are receiving anticoagulant treatment, although they are less likely to occur with topical metronidazole administration because of low absorption. ( 7 )

👥 Use in Specific Populations ~1 min read ▾

8 USE IN SPECIFIC POPULATIONS

8.1Pregnancy Teratogenic Effects: Pregnancy Category B. There are no adequate and well-controlled studies with the use of metronidazole in pregnant women. Metronidazole crosses the placental barrier and enters the fetal circulation rapidly.

No fetotoxicity was observed after oral administration of metronidazole in rats or mice at 200 and 20 times, respectively, the expected clinical dose. However, oral metronidazole has shown carcinogenic activity in rodents. Because animal reproduction studies are not always predictive of human response, metronidazole should be used during pregnancy only if clearly needed.

8.3Nursing Mothers After oral administration, metronidazole is secreted in breast milk in concentrations similar to those found in the plasma. Even though blood levels taken after topical metronidazole application are significantly lower than those achieved after oral metronidazole 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 and the risk to the infant.

8.4Pediatric Use Safety and effectiveness in pediatric patients have not been established.

8.5Geriatric Use Sixty-six subjects aged 65 years and older were treated with metronidazole gel USP, 1% in the clinical study. No overall differences in safety or effectiveness were observed between these subjects and younger subjects, and other reported clinical experience has not identified differences in responses between the elderly and younger patients, but greater sensitivity of some older individuals cannot be ruled out.

🤰 Pregnancy 86 words ▾

8.1Pregnancy Teratogenic Effects: Pregnancy Category B. There are no adequate and well-controlled studies with the use of metronidazole in pregnant women. Metronidazole crosses the placental barrier and enters the fetal circulation rapidly.

No fetotoxicity was observed after oral administration of metronidazole in rats or mice at 200 and 20 times, respectively, the expected clinical dose. However, oral metronidazole has shown carcinogenic activity in rodents. Because animal reproduction studies are not always predictive of human response, metronidazole should be used during pregnancy only if clearly needed.

🧒 Pediatric Use 13 words ▾

8.4Pediatric Use Safety and effectiveness in pediatric patients have not been established.

🧓 Geriatric Use 64 words ▾

8.5Geriatric Use Sixty-six subjects aged 65 years and older were treated with metronidazole gel USP, 1% in the clinical study. No overall differences in safety or effectiveness were observed between these subjects and younger subjects, and other reported clinical experience has not identified differences in responses between the elderly and younger patients, but greater sensitivity of some older individuals cannot be ruled out.

🆘 Overdosage 25 words ▾

10 OVERDOSAGE There are no reported human experiences with overdosage of metronidazole. Topically applied metronidazole can be absorbed in sufficient amount to produce systemic effects.

🧬 Clinical Pharmacology 129 words ▾

12 CLINICAL PHARMACOLOGY

12.1Mechanism of Action The mechanism of action of metronidazole in the treatment of rosacea is unknown.

12.2Pharmacodynamics The pharmacodynamics of metronidazole in association with the treatment of rosacea are unknown.

12.3Pharmacokinetics Topical administration of a one gram dose of metronidazole to the face of 13 patients with moderate to severe rosacea once daily for 7 days resulted in a mean ± SD C max of metronidazole of 32 ± 9 ng/mL. The mean ± SD AUC (0-24) was 595 ± 154 ng*hr/mL. The mean C max and AUC (0-24) are less than 1% of the value reported for a single 250 mg oral dose of metronidazole.

The time to maximum plasma concentration (T max ) was 6 to 10 hours after topical application.

🧬 Mechanism of Action 17 words ▾

12.1Mechanism of Action The mechanism of action of metronidazole in the treatment of rosacea is unknown.

📦 How Supplied / Storage and Handling 53 words ▾

16 HOW SUPPLIED/STORAGE AND HANDLING Metronidazole Gel USP, 1% is colorless to slightly yellow in color, and supplied as follows: 45 g tube - (NDC 51672-4164-6) 60 g tube - (NDC 51672-4164-3) 55 g pump - (NDC 51672-4164-9) Storage Conditions: Store at 20° to 25°C (68° to 77°F) [see USP Controlled Room Temperature].

📦 Storage and Handling 15 words ▾

Storage Conditions: Store at 20° to 25°C (68° to 77°F) [see USP Controlled Room Temperature].

📋 Description 113 words ▾

11 DESCRIPTION Metronidazole Gel USP, 1% contains metronidazole, USP. Chemically, metronidazole is 2-methyl-5-nitro-1 H -imidazole- 1-ethanol. The molecular formula for metronidazole is C 6 H 9 N 3 O 3 .

It has the following structural formula: Metronidazole has a molecular weight of 171.16. It is a white to pale yellow crystalline powder. It is slightly soluble in alcohol and has solubility in water of 10 mg/mL at 20°C.

Metronidazole belongs to the nitroimidazole class of compounds. Metronidazole is a colorless to slightly yellow gel; each gram contains 10 mg of metronidazole in a base of alcohol (10% w/w), disodium edetate, hydroxyethylcellulose, methylparaben, polyethylene glycol, propylene glycol, propylparaben, and purified water. Chemical Structure

💬 Information for Patients 77 words ▾

17 PATIENT COUNSELING INFORMATION Patients using Metronidazole Gel USP, 1% should receive the following information and instructions: This medication is to be used as directed. It is for external use only. Avoid contact with the eyes.

Cleanse affected area(s) before applying Metronidazole Gel USP, 1%. This medication should not be used for any condition other than that for which it is prescribed. Keep out of reach of children.

Patients should report any adverse reaction to their physicians.

🍼 Nursing Mothers 70 words ▾

8.3Nursing Mothers After oral administration, metronidazole is secreted in breast milk in concentrations similar to those found in the plasma. Even though blood levels taken after topical metronidazole application are significantly lower than those achieved after oral metronidazole 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 and the risk to the infant.

🧬 Pharmacokinetics 94 words ▾

12.3Pharmacokinetics Topical administration of a one gram dose of metronidazole to the face of 13 patients with moderate to severe rosacea once daily for 7 days resulted in a mean ± SD C max of metronidazole of 32 ± 9 ng/mL. The mean ± SD AUC (0-24) was 595 ± 154 ng*hr/mL. The mean C max and AUC (0-24) are less than 1% of the value reported for a single 250 mg oral dose of metronidazole.

The time to maximum plasma concentration (T max ) was 6 to 10 hours after topical application.

🧬 Pharmacodynamics 15 words ▾

12.2Pharmacodynamics The pharmacodynamics of metronidazole in association with the treatment of rosacea are unknown.

🔬 Clinical Studies ~1 min read ▾

14 CLINICAL STUDIES In a randomized, vehicle-controlled trial, 746 subjects with rosacea were treated with metronidazole gel USP, 1% or gel vehicle once daily for 10 weeks. Most subjects had "moderate" rosacea at baseline. Efficacy was determined by recording reduction in inflammatory lesion counts and success rate in the Investigator Global Assessment (percentage of subjects "clear" and "almost clear" of rosacea at the end of the study).

The scale is based on the following definitions: Table 3: Investigator Global Assessment Scale Score Grade Definition 0 Clear No signs or symptoms present; at most, mild erythema 1 Almost Clear Very mild erythema present. Very few small papules/pustules 2 Mild Mild erythema. Several small papules/pustules 3 Moderate Moderate erythema.

Several small or large papules/pustules, and up to 2 nodules 4 Severe Severe erythema. Numerous small and/or large papules/pustules, up to several nodules The results are shown in the following table: Table 4: Inflammatory Lesion Counts and Global Scores in a Clinical Trial of Rosacea Metronidazole Gel USP, 1% Vehicle N Results N (%) N Results N (%) Inflammatory lesions 557 189 Baseline, mean count 18.3

18.4Week-10, mean count 8.9

12.8Reduction 9.4 (50.7) 5.6 (32.6) Investigator Global Assessment 557 189 Subject clear or almost clear 214 (38.42) 52 (27.51) Subject with no change 159 (28.5) 77 (40.7) Subjects treated with metronidazole gel USP, 1% experienced a mean reduction of 9.4 inflammatory lesions in the Week-10 LOCF group, compared to a reduction of 5.6 for those treated with vehicle, or a difference in means of 3.8 lesions. The contribution to efficacy of individual components of the vehicle has not been established.

🧪 Nonclinical Toxicology ~1 min read ▾

13 NONCLINICAL TOXICOLOGY

13.1Carcinogenesis, Mutagenesis, Impairment of Fertility Metronidazole has shown evidence of carcinogenic activity in a number of studies involving chronic, oral administration in mice and rats, but not in studies involving hamsters. In several long-term studies in mice, oral doses of approximately 225 mg/m 2 /day or greater (approximately 37 times the human topical dose on a mg/m 2 basis) were associated with an increase in pulmonary tumors and lymphomas. Several long-term oral studies in the rat have shown statistically significant increases in mammary and hepatic tumors at doses >885 mg/m 2 /day (144 times the human dose).

Metronidazole has shown evidence of mutagenic activity in several in vitro bacterial assay systems. In addition, a dose-related increase in the frequency of micronuclei was observed in mice after intraperitoneal injections. An increase in chromosomal aberrations in peripheral blood lymphocytes was reported in patients with Crohn's disease who were treated with 200 to 1200 mg/day of metronidazole for 1 to 24 months.

However, in another study, no increase in chromosomal aberrations in circulating lymphocytes was observed in patients with Crohn's disease treated with the drug for 8 months. In one published study, using albino hairless mice, intraperitoneal administration of metronidazole at a dose of 45 mg/m 2 /day (approximately 7 times the human topical dose on a mg/m 2 basis) was associated with an increase in ultraviolet radiation induced skin carcinogenesis. Neither dermal carcinogenicity nor photocarcinogenicity studies have been performed with metronidazole gel USP, 1% or any marketed metronidazole formulations.

📄 Carcinogenesis, Mutagenesis, Impairment of Fertility ~1 min read ▾

13.1Carcinogenesis, Mutagenesis, Impairment of Fertility Metronidazole has shown evidence of carcinogenic activity in a number of studies involving chronic, oral administration in mice and rats, but not in studies involving hamsters. In several long-term studies in mice, oral doses of approximately 225 mg/m 2 /day or greater (approximately 37 times the human topical dose on a mg/m 2 basis) were associated with an increase in pulmonary tumors and lymphomas. Several long-term oral studies in the rat have shown statistically significant increases in mammary and hepatic tumors at doses >885 mg/m 2 /day (144 times the human dose).

Metronidazole has shown evidence of mutagenic activity in several in vitro bacterial assay systems. In addition, a dose-related increase in the frequency of micronuclei was observed in mice after intraperitoneal injections. An increase in chromosomal aberrations in peripheral blood lymphocytes was reported in patients with Crohn's disease who were treated with 200 to 1200 mg/day of metronidazole for 1 to 24 months.

However, in another study, no increase in chromosomal aberrations in circulating lymphocytes was observed in patients with Crohn's disease treated with the drug for 8 months. In one published study, using albino hairless mice, intraperitoneal administration of metronidazole at a dose of 45 mg/m 2 /day (approximately 7 times the human topical dose on a mg/m 2 basis) was associated with an increase in ultraviolet radiation induced skin carcinogenesis. Neither dermal carcinogenicity nor photocarcinogenicity studies have been performed with metronidazole gel USP, 1% or any marketed metronidazole formulations.

📄 Package Label / Principal Display Panel 49 words ▾

PRINCIPAL DISPLAY PANEL - 45 g Tube Carton NDC 51672-4164-6 45 g Metronidazole Gel USP, 1% FOR TOPICAL USE ONLY. NOT FOR ORAL, OPHTHALMIC OR INTRAVAGINAL USE. Rx only Keep this and all medications out of the reach of children. TARO PRINCIPAL DISPLAY PANEL - 45 g Tube Carton

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

Medicare Part D spend CMS · PART D · 2026 (Q1)

Medicare Part D (outpatient prescription) spending for Metronidazole — the program that covers self-administered drugs. 23 manufacturers.
⚠️ Drug-level data: CMS publishes Part D spending by drug, not by NDC — these figures combine every manufacturer, strength and package size sold under the name Metronidazole. That’s a different level of aggregation than the Medicaid card above, which is specific to this exact 11-digit NDC (pack size included), so the two aren’t directly comparable.
Period
Total Part D spend
$12.08M
Claims incl. refills
571.7K
Beneficiaries
500.3K
Spend / beneficiary
$24.15
Spend / claim
$21.13
Trend by period
💵 About the dollar figures: spending is what Part D plans paid before confidential manufacturer rebates, so the program’s real net cost is lower. A blank patient count means fewer than 11 people — CMS hides counts that small to protect privacy. Source: CMS Medicare Quarterly Part D Spending by Drug (data.cms.gov), updated quarterly.

About this NDC listing & data coverage

Finished prescription product No longer marketed (per FDA listing data)
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) ✓ Available
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

What does the discontinued status mean for this NDC?
The labeler reported a marketing end date (or the listing was delisted), so this specific package is no longer actively marketed. Remaining stock may still be dispensed for a time, and the NDC stays valid for historical records and claims — but data feeds (pricing, labeling) typically stop updating for it. Other package sizes or other manufacturers' versions of the same medication may still be marketed — see the equivalents section where available.
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.
Does this product come in other package sizes?
Yes — the FDA directory lists 2 other package presentations of this same product, including 1 tube (51672-4164-03), 1 tube (51672-4164-06). 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?
Sun Pharmaceutical Industries, Inc. 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.
← 51672-4154-03 · Sun 51672-4166-06 · Taro →
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.