Inactive ingredients by manufacturer

Methsuximide inactive ingredients by manufacturer

Wondering whether your Methsuximide 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 Methsuximide 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 2 of the 2 current Methsuximide products on the market today, from 2 companies listing it with the FDA, and lined them up side by side.

Ask about your bottle

Is there something in your Methsuximide? 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 Methsuximide products list lactose, a gluten source, soy, dyes or gelatin?

  1. LactoseNo checked product

    No checked Methsuximide product lists lactose.

  2. Wheat or gluten sourceNo checked product

    No checked Methsuximide product lists a wheat or gluten source.

  3. SoyNo checked product

    No checked Methsuximide product lists soy.

  4. Synthetic dyesEvery checked product

    Every checked Methsuximide product (2) lists synthetic dyes. See the products

  5. GelatinEvery checked product

    Every checked Methsuximide product (2) lists gelatin. See the products

Also listed by some products: Corn 2 of 2 Carmine or shellac 1 of 2 Alcohol 1 of 2 Propylene glycol 1 of 2

Find a version without it

Every current Methsuximide product and what its label lists

Hide products that list:

ProductListsInactive ingredients on the label
ANI Pharmaceuticals, Inc. 1 product
300 mg capsuleNDC 70954-0228-10 Corn-derived Synthetic dyes Gelatin Carmine or shellac Alcohol (ethanol) Propylene glycol
Show 16 ingredients

ALCOHOL, AMMONIA, BUTYL ALCOHOL, D&C YELLOW NO. 10, FD&C YELLOW NO. 6, FERROSOFERRIC OXIDE, GELATIN, ISOPROPYL ALCOHOL, MAGNESIUM STEARATE, POTASSIUM HYDROXIDE, PROPYLENE GLYCOL, SHELLAC, SILICON DIOXIDE, SODIUM LAURYL SULFATE, STARCH, CORN, WATER
Parke-Davis Div of Pfizer Inc 1 product
300 mg capsuleNDC 00071-0525-24 Corn-derived Synthetic dyes Gelatin
Show 6 ingredients

D&C YELLOW NO. 10, FD&C YELLOW NO. 6, GELATIN, UNSPECIFIED, SILICON DIOXIDE, SODIUM LAURYL SULFATE, STARCH, CORN

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.

Methsuximide and synthetic dyes

Synthetic dyes: FD&C or D&C colorants and their aluminum lakes. Every checked Methsuximide product (2) lists synthetic dyes.

Lists synthetic dyes

Methsuximide and gelatin

Gelatin: animal-derived (usually bovine or porcine); a concern for vegetarian, kosher or halal needs. Every checked Methsuximide product (2) lists gelatin.

Lists gelatin

Methsuximide and corn-derived ingredients

Corn-derived: corn starch, maize or corn syrup; a concern with corn allergy. Every checked Methsuximide product (2) lists corn-derived ingredients.

Lists corn-derived ingredients

Methsuximide without carmine or shellac

Carmine or shellac: insect-derived red colorant or coating glaze. 1 of 2 checked products list carmine or shellac; 1 does not.

Does not list carmine or shellac

Lists carmine or shellac

Methsuximide without alcohol (ethanol)

Alcohol (ethanol): mostly in liquids; a concern in alcohol recovery, for children, or with disulfiram or metronidazole. 1 of 2 checked products list alcohol (ethanol); 1 does not.

Does not list alcohol (ethanol)

Lists alcohol (ethanol)

Methsuximide without propylene glycol

Propylene glycol: A solvent in liquids and capsules; a concern in kidney disease, for infants, and at high doses. 1 of 2 checked products list propylene glycol; 1 does not.

Does not list propylene glycol

Lists propylene glycol

At the pharmacy counter

How to use this at the pharmacy counter

  1. 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.
  2. 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.
  3. 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.
  4. 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 Methsuximide product suits you →

Common questions about Methsuximide inactive ingredients

Is Methsuximide gluten-free?
This page cannot certify any Methsuximide product gluten-free; it reports what each label declares. Of the 2 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 Methsuximide contain lactose?
No checked Methsuximide 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 Methsuximide contain soy?
No checked Methsuximide 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 Methsuximide?
Every checked Methsuximide product (2) 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 Methsuximide contain gelatin?
Every checked Methsuximide product (2) 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 Methsuximide 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 5, 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 Methsuximide products in the FDA's current NDC directory (openFDA), as of October 5, 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 Methsuximide guide