Isoniazid inactive ingredients by manufacturer

Name: Isoniazid Inactive Ingredients by Manufacturer
Creator: HelloPharmacist

Wondering whether your Isoniazid has lactose, gluten, soy, a dye or gelatin in it? The medicine is the same, but the fillers, coatings and colors differ from one company to the next. This page shows what each Isoniazid product's FDA label lists, so you can find a version that leaves out what you avoid and ask your pharmacist for it by its NDC.

We have read the FDA labels of 21 of the 27 current Isoniazid products on the market today, from 14 companies listing it with the FDA, and lined them up side by side. 6 are still being read and will appear on a later visit.

Ask about your bottle

Is there something in your Isoniazid? Ask in plain words.

Name the company, strength or the NDC on your bottle and the ingredient you avoid. The answer comes only from the FDA labels on this page.

Answers are drawn from the FDA label data on this page and checked against it. They are not medical advice: confirm with your pharmacist before relying on them.

The short answer

Which Isoniazid products list lactose, a gluten source, soy, dyes or gelatin?

LactoseNo checked product

No checked Isoniazid product lists lactose.
Wheat or gluten sourceNo checked product

No checked Isoniazid product lists a wheat or gluten source.
SoyNo checked product

No checked Isoniazid product lists soy.
Synthetic dyesNo checked product

No checked Isoniazid product lists synthetic dyes.
GelatinNo checked product

No checked Isoniazid product lists gelatin.

Also listed by some products: Corn 12 of 21 Sorbitol or mannitol 1 of 21

Find a version without it

Every current Isoniazid product and what its label lists

Hide products that list:

Product	Lists	Inactive ingredients on the label
A-S Medication Solutions 3 products
100 mg tabletNDC 50090-0410-00	Still being read	Not read yet
300 mg tabletNDC 50090-0370-00	Corn-derived	Show 5 ingredients CROSPOVIDONE (120 .MU.M), MICROCRYSTALLINE CELLULOSE, SILICA, TALC, ZEA MAYS (CORN) STARCH
300 mg tabletNDC 50090-7660-03	Still being read	Not read yet
Aphena Pharma Solutions - Tennessee, LLC 1 product
300 mg tabletNDC 71610-0395-30	Corn-derived	Show 5 ingredients CELLULOSE, MICROCRYSTALLINE, CROSPOVIDONE (15 MPA.S AT 5%), SILICON DIOXIDE, STARCH, CORN, TALC
Bryant Ranch Prepack 5 products
100 mg tabletNDC 71335-3083-01	Corn-derived	Show 5 ingredients CROSPOVIDONE (120 .MU.M), MICROCRYSTALLINE CELLULOSE, SILICON DIOXIDE, STARCH, CORN, TALC
100 mg tabletNDC 72162-2444-01	None of these listed	Show 4 ingredients CROSCARMELLOSE SODIUM, MICROCRYSTALLINE CELLULOSE, SILICON DIOXIDE, STEARIC ACID
300 mg tabletNDC 71335-2760-01	Corn-derived	Show 5 ingredients CROSPOVIDONE (120 .MU.M), MICROCRYSTALLINE CELLULOSE, SILICON DIOXIDE, STARCH, CORN, TALC
300 mg tabletNDC 71335-2800-01	Corn-derived	Show 5 ingredients CROSPOVIDONE (120 .MU.M), MICROCRYSTALLINE CELLULOSE, SILICON DIOXIDE, STARCH, CORN, TALC
300 mg tabletNDC 72162-2445-01	None of these listed	Show 4 ingredients CROSCARMELLOSE SODIUM, MICROCRYSTALLINE CELLULOSE, SILICON DIOXIDE, STEARIC ACID
Chartwell RX, LLC 2 products
50 mg/5 mL oral solutionNDC 62135-0550-47	None of these listed	Show 3 ingredients GLYCERIN, METHYLPARABEN, PROPYLPARABEN
300 mg tabletNDC 62135-0709-90	Corn-derived	Show 6 ingredients CALCIUM STEARATE, CALCIUM SULFATE DIHYDRATE, CROSCARMELLOSE SODIUM, POVIDONE K30, STARCH, CORN, WATER
CMP Pharma, Inc. 1 product
50 mg/5 mL oral solutionNDC 46287-0009-01	Sorbitol or mannitol	Show 3 ingredients ANHYDROUS CITRIC ACID, POTASSIUM SORBATE, SORBITOL
Coupler LLC 2 products
300 mg tabletNDC 67046-1570-03	Corn-derived	Show 5 ingredients CROSPOVIDONE (120 .MU.M), MICROCRYSTALLINE CELLULOSE, SILICON DIOXIDE, STARCH, CORN, TALC
300 mg tabletNDC 67046-1617-03	None of these listed	Show 4 ingredients CELLULOSE, MICROCRYSTALLINE, CROSCARMELLOSE SODIUM, SILICON DIOXIDE, STEARIC ACID
Genus Lifesciences 2 products
100 mg tabletNDC 64950-0216-10	Corn-derived	Show 5 ingredients CROSPOVIDONE (120 .MU.M), MICROCRYSTALLINE CELLULOSE, SILICON DIOXIDE, STARCH, CORN, TALC
300 mg tabletNDC 64950-0217-03	Corn-derived	Show 5 ingredients CROSPOVIDONE (120 .MU.M), MICROCRYSTALLINE CELLULOSE, SILICON DIOXIDE, STARCH, CORN, TALC
Marlex Pharmaceuticals, Inc. 2 products
100 mg tabletNDC 10135-0804-01	Still being read	Not read yet
300 mg tabletNDC 10135-0805-01	Still being read	Not read yet
Mylan Institutional Inc. 1 product
300 mg tabletNDC 51079-0083-20	Still being read	Not read yet
Omnivium Pharmaceuticals Llc. 2 products
100 mg tabletNDC 81665-0107-10	None of these listed	Show 4 ingredients CELLULOSE, MICROCRYSTALLINE, CROSCARMELLOSE SODIUM, SILICON DIOXIDE, STEARIC ACID
300 mg tabletNDC 81665-0108-10	None of these listed	Show 4 ingredients CELLULOSE, MICROCRYSTALLINE, CROSCARMELLOSE SODIUM, SILICON DIOXIDE, STEARIC ACID
Proficient Rx LP 1 product
300 mg tabletNDC 63187-0978-30	Corn-derived	Show 5 ingredients CROSPOVIDONE (15 MPA.S AT 5%), MICROCRYSTALLINE CELLULOSE, SILICON DIOXIDE, STARCH, CORN, TALC
Remedyrepack Inc. 2 products
300 mg tabletNDC 70518-4540-00	None of these listed	Show 4 ingredients CELLULOSE, MICROCRYSTALLINE, CROSCARMELLOSE SODIUM, SILICON DIOXIDE, STEARIC ACID
300 mg tabletNDC 70518-4315-00	Corn-derived	Show 5 ingredients CROSPOVIDONE (120 .MU.M), MICROCRYSTALLINE CELLULOSE, SILICON DIOXIDE, STARCH, CORN, TALC
Sandoz Inc 1 product
100 mg/mL injectionNDC 00781-3056-70	None of these listed	Show 3 ingredients CHLOROBUTANOL, HYDROCHLORIC ACID, SODIUM HYDROXIDE
Teva Pharmaceuticals USA, Inc. 2 products
100 mg tabletNDC 00555-0066-02	Still being read	Not read yet
300 mg tabletNDC 00555-0071-01	Corn-derived	Show 5 ingredients CELLULOSE, MICROCRYSTALLINE, CROSPOVIDONE (15 MPA.S AT 5%), SILICON DIOXIDE, STARCH, CORN, TALC

A product with none of these listed is not certified to be without them: the label says what the manufacturer declared, and the source of a starch or a flavor is often not stated. The companies are the FDA's labelers, which include repackagers and distributors selling another company's product under their own label. The NDC opens the product's own page, with the full label and its inactive-ingredient notes.

Isoniazid without corn-derived ingredients

Corn-derived: corn starch, maize or corn syrup; a concern with corn allergy. 12 of 21 checked products list corn-derived ingredients; 9 do not.

Does not list corn-derived ingredients

Bryant Ranch Prepack: 100 mg tablet, 300 mg tablet
Chartwell RX: 50 mg/5 mL oral solution
CMP: 50 mg/5 mL oral solution
Coupler: 300 mg tablet
Omnivium: 100 mg tablet, 300 mg tablet
Remedyrepack: 300 mg tablet
Sandoz: 100 mg/mL injection

Lists corn-derived ingredients

A-S Medication Solutions: 300 mg tablet
Aphena Pharma Solutions - Tennessee: 300 mg tablet
Bryant Ranch Prepack: 100 mg tablet, 300 mg tablet (NDC 71335-2760-01), 300 mg tablet (NDC 71335-2800-01)
Chartwell RX: 300 mg tablet
Coupler: 300 mg tablet
Genus Lifesciences: 100 mg tablet, 300 mg tablet
Proficient Rx: 300 mg tablet
Remedyrepack: 300 mg tablet
Teva: 300 mg tablet

Isoniazid without sorbitol or mannitol

Sorbitol or mannitol: sugar alcohols that can cause bloating or diarrhea in larger amounts. 1 of 21 checked products list sorbitol or mannitol; 20 do not.

Does not list sorbitol or mannitol

A-S Medication Solutions: 300 mg tablet
Aphena Pharma Solutions - Tennessee: 300 mg tablet
Bryant Ranch Prepack: 100 mg tablet (NDC 71335-3083-01), 100 mg tablet (NDC 72162-2444-01), 300 mg tablet (NDC 71335-2760-01), 300 mg tablet (NDC 71335-2800-01), 300 mg tablet (NDC 72162-2445-01)
Chartwell RX: 50 mg/5 mL oral solution, 300 mg tablet
Coupler: 300 mg tablet (NDC 67046-1570-03), 300 mg tablet (NDC 67046-1617-03)
Genus Lifesciences: 100 mg tablet, 300 mg tablet
Omnivium: 100 mg tablet, 300 mg tablet
Proficient Rx: 300 mg tablet
Remedyrepack: 300 mg tablet (NDC 70518-4540-00), 300 mg tablet (NDC 70518-4315-00)
Sandoz: 100 mg/mL injection
Teva: 300 mg tablet

Lists sorbitol or mannitol

CMP: 50 mg/5 mL oral solution

At the pharmacy counter

How to use this at the pharmacy counter

Pick the company whose list suits you and copy the NDC from the table. Many pharmacies order from wholesalers that carry several companies' versions and can request a particular one if you ask before the prescription is filled; some buy from one contracted source only, and a few insurance plans cover only certain NDCs, so ask the pharmacist to check.
Treat "does not list" as exactly that. The label is what the manufacturer declared; a flavor or a starch may have an unstated source, and lines change. For celiac disease or a serious allergy, ask the manufacturer's medical information line for a written statement about the lot you have.
Check the bottle each refill. A different company usually means a different shape, color and inactive-ingredient list; the pharmacist can tell you who made it, and the two-NDC comparison shows the difference line by line.
If you need one company's version kept constant, ask your prescriber to write that company or the NDC on the prescription and tell the pharmacy you need it held. Rules vary by state and plan, so confirm with the pharmacist.

Ask Dr. Staiger which Isoniazid product suits you →

Common questions about Isoniazid inactive ingredients

Is Isoniazid gluten-free?

This page cannot certify any Isoniazid product gluten-free; it reports what each label declares. Of the 21 products checked, none lists a wheat, barley, rye or gluten ingredient, and none lists a starch without a stated source. If you have celiac disease, ask the manufacturer's medical information line for a written gluten statement for the lot you have.

Does Isoniazid contain lactose?

No checked Isoniazid product lists lactose on its label. The lactose in a tablet or capsule is a small amount, but people with a milk allergy or a strong intolerance often prefer a version that does not list it.

Does Isoniazid contain soy?

No checked Isoniazid product lists a soy ingredient (soybean oil or soy lecithin) on its label. Soy lecithin is the usual form and the amount is small, but people with a soy allergy often prefer a version that does not list it.

Is there a dye-free Isoniazid?

No checked Isoniazid product lists a synthetic dye (an FD&C or D&C colorant) on its label. Colorants often differ by strength within one company's line, so compare the lists above strength by strength.

Does Isoniazid contain gelatin?

No checked Isoniazid product lists gelatin on its label. Gelatin is usually bovine or porcine and the label rarely says which; for kosher, halal or vegetarian needs, ask the manufacturer.

Why do the inactive ingredients differ between manufacturers?

A generic must match the brand's active ingredient, strength, dose form and how it is absorbed; its fillers, binders, coatings and colorants are the manufacturer's own choice. That is why one Isoniazid product can list lactose and a dye while another from a different company lists neither.

Can my pharmacy give me a specific manufacturer's version?

Often, if you ask before the prescription is filled: many pharmacies order from wholesalers that carry several companies' versions and can request a particular one. Some pharmacies buy a generic from one contracted source only, and a few insurance plans cover only certain NDCs, so ask the pharmacist to check. Give them the NDC from this page; the company name alone is often enough.

How current is this list?

The products are the ones in the FDA's current NDC directory as of October 6, 2026, and each inactive-ingredient list is the manufacturer's FDA label as our label sync last read it. Formulations change, so check the label on your own bottle and ask your pharmacist if a refill looks different.

Sources: the products are the finished Isoniazid products in the FDA's current NDC directory (openFDA), as of October 6, 2026; each inactive-ingredient list is the manufacturer's FDA Structured Product Label via DailyMed, as our label sync last read it. The concern groups are HelloPharmacist's classification of the names the label declares. Educational information only, not medical advice; confirm with your pharmacist before relying on a list. ← Back to the Isoniazid guide