Inactive ingredients by manufacturer

Ethosuximide inactive ingredients by manufacturer

Wondering whether your Ethosuximide 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 Ethosuximide 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 10 of the 12 current Ethosuximide products on the market today, from 9 companies listing it with the FDA, and lined them up side by side. 2 are still being read and will appear on a later visit.

Ask about your bottle

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

  1. LactoseNo checked product

    No checked Ethosuximide product lists lactose.

  2. Wheat or gluten sourceNo checked product

    No checked Ethosuximide product lists a wheat or gluten source.

  3. SoyDiffers by manufacturer

    1 of 10 checked products list soy; 9 do not. See the products

    Does not list it Bionpharma Bryant Ranch Prepack Chartwell Governmental & Specialty RX Chartwell RX Epic Mylan Parke-Davis Div of Pfizer
    Lists it Strides Pharma Science
  4. Synthetic dyesEvery checked product

    Every checked Ethosuximide product (10) lists synthetic dyes. See the products

  5. GelatinDiffers by manufacturer

    7 of 10 checked products list gelatin; 3 do not. See the products

    Does not list it Chartwell Governmental & Specialty RX Chartwell RX Mylan
    Lists it Bionpharma Bryant Ranch Prepack Chartwell RX Epic Parke-Davis Div of Pfizer Strides Pharma Science

Also listed by some products: Titanium dioxide 4 of 10 Carmine or shellac 4 of 10 Propylene glycol 6 of 10 PEG or polysorbate 7 of 10 Sorbitol or mannitol 3 of 10 Sugar 3 of 10

Find a version without it

Every current Ethosuximide product and what its label lists

Hide products that list:

ProductListsInactive ingredients on the label
Bionpharma Inc. 1 product
250 mg capsuleNDC 69452-0152-20 Synthetic dyes Gelatin Propylene glycol Polyethylene glycol or polysorbate
Show 8 ingredients

FD&C YELLOW NO. 6, FERROSOFERRIC OXIDE, GELATIN, GLYCERIN, HYPROMELLOSE, UNSPECIFIED, POLYETHYLENE GLYCOL, UNSPECIFIED, PROPYLENE GLYCOL, WATER
Bryant Ranch Prepack 1 product
250 mg capsuleNDC 63629-8005-01 Synthetic dyes Gelatin Propylene glycol Polyethylene glycol or polysorbate
Show 8 ingredients

FD&C YELLOW NO. 6, FERROSOFERRIC OXIDE, GELATIN, UNSPECIFIED, GLYCERIN, HYPROMELLOSE, UNSPECIFIED, POLYETHYLENE GLYCOL, UNSPECIFIED, PROPYLENE GLYCOL, WATER
Chartwell Governmental & Specialty RX, LLC. 1 product
250 mg/5 mL oral solutionNDC 68999-0064-24 Synthetic dyes Sugar (sucrose, dextrose)
Show 10 ingredients

ANHYDROUS CITRIC ACID, ETHYL MALTOL, FD&C RED NO. 40, FD&C YELLOW NO. 6, GLYCERIN, SACCHARIN SODIUM, SODIUM BENZOATE, SODIUM CITRATE, UNSPECIFIED FORM, SUCROSE, WATER
Chartwell RX, LLC 2 products
250 mg capsuleNDC 62135-0790-12 Synthetic dyes Titanium dioxide Gelatin Carmine or shellac Propylene glycol Polyethylene glycol or polysorbate Sorbitol or mannitol
Show 16 ingredients

AMMONIA, BUTYL ALCOHOL, DIMETHICONE, FD&C RED NO. 40, FD&C YELLOW NO. 6, GELATIN, UNSPECIFIED, GLYCERIN, ISOPROPYL ALCOHOL, METHYLPARABEN, MINERAL OIL, POLYETHYLENE GLYCOL, UNSPECIFIED, PROPYLENE GLYCOL, PROPYLPARABEN, SHELLAC, SORBITOL, TITANIUM DIOXIDE
250 mg/5 mL oral solutionNDC 62135-0064-47 Synthetic dyes Sugar (sucrose, dextrose)
Show 10 ingredients

ANHYDROUS CITRIC ACID, ETHYL MALTOL, FD&C RED NO. 40, FD&C YELLOW NO. 6, GLYCERIN, SACCHARIN SODIUM, SODIUM BENZOATE, SODIUM CITRATE, UNSPECIFIED FORM, SUCROSE, WATER
Epic Pharma, LLC 2 products
250 mg capsuleNDC 42806-0708-01 Synthetic dyes Titanium dioxide Gelatin Carmine or shellac Propylene glycol Polyethylene glycol or polysorbate
Show 10 ingredients

BUTYL ALCOHOL, FD&C RED NO. 3, FD&C YELLOW NO. 6, GELATIN, UNSPECIFIED, GLYCERIN, POLYETHYLENE GLYCOL 400, PROPYLENE GLYCOL, SHELLAC, TITANIUM DIOXIDE, WATER
250 mg capsuleNDC 42806-0711-01 Synthetic dyes Titanium dioxide Gelatin Carmine or shellac Propylene glycol Polyethylene glycol or polysorbate
Show 10 ingredients

BUTYL ALCOHOL, FD&C RED NO. 3, FD&C YELLOW NO. 6, GELATIN, UNSPECIFIED, GLYCERIN, POLYETHYLENE GLYCOL 400, PROPYLENE GLYCOL, SHELLAC, TITANIUM DIOXIDE, WATER
Mylan Pharmaceuticals Inc. 1 product
250 mg/5 mL oral solutionNDC 59762-2350-06 Synthetic dyes Sugar (sucrose, dextrose)
Show 9 ingredients

CITRIC ACID MONOHYDRATE, FD&C RED NO. 40, FD&C YELLOW NO. 6, GLYCERIN, SACCHARIN SODIUM, SODIUM BENZOATE, SODIUM CITRATE, UNSPECIFIED FORM, SUCROSE, WATER
PAI Holdings, LLC dba PAI Pharma 1 product
250 mg/5 mL oral solutionNDC 00121-0670-16 Still being read Not read yet
Parke-Davis Div of Pfizer Inc 2 products
250 mg capsuleNDC 00071-0237-24 Synthetic dyes Gelatin Polyethylene glycol or polysorbate Sorbitol or mannitol
Show 6 ingredients

D&C YELLOW NO. 10, FD&C RED NO. 3, GELATIN, UNSPECIFIED, GLYCERIN, POLYETHYLENE GLYCOL 400, SORBITOL
250 mg/5 mL oral solutionNDC 00071-2418-19 Still being read Not read yet
Strides Pharma Science Limited 1 product
250 mg capsuleNDC 64380-0878-06 Soy Synthetic dyes Titanium dioxide Gelatin Carmine or shellac Propylene glycol Polyethylene glycol or polysorbate Sorbitol or mannitol
Show 13 ingredients

D&C YELLOW NO. 10, FD&C RED NO. 3, GELATIN, GLYCERIN, ISOPROPYL ALCOHOL, LECITHIN, SOYBEAN, MEDIUM-CHAIN TRIGLYCERIDES, NONCRYSTALLIZING SORBITOL SOLUTION, POLYETHYLENE GLYCOL 400, PROPYLENE GLYCOL, SHELLAC, SODIUM LAURYL SULFATE, TITANIUM DIOXIDE

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.

Ethosuximide without soy

Soy: soybean oil or soy lecithin; a concern with soy allergy. 1 of 10 checked products list soy; 9 do not.

Does not list soy

Lists soy

Ethosuximide and synthetic dyes

Synthetic dyes: FD&C or D&C colorants and their aluminum lakes. Every checked Ethosuximide product (10) lists synthetic dyes.

Lists synthetic dyes

Ethosuximide without gelatin

Gelatin: animal-derived (usually bovine or porcine); a concern for vegetarian, kosher or halal needs. 7 of 10 checked products list gelatin; 3 do not.

Does not list gelatin

Lists gelatin

Ethosuximide without titanium dioxide

Titanium dioxide: A white colorant some people choose to avoid. 4 of 10 checked products list titanium dioxide; 6 do not.

Does not list titanium dioxide

Lists titanium dioxide

Ethosuximide without carmine or shellac

Carmine or shellac: insect-derived red colorant or coating glaze. 4 of 10 checked products list carmine or shellac; 6 do not.

Does not list carmine or shellac

Lists carmine or shellac

Ethosuximide without propylene glycol

Propylene glycol: A solvent in liquids and capsules; a concern in kidney disease, for infants, and at high doses. 6 of 10 checked products list propylene glycol; 4 do not.

Does not list propylene glycol

Lists propylene glycol

Ethosuximide without polyethylene glycol or polysorbate

Polyethylene glycol or polysorbate: PEG, macrogol or polysorbate; a rare cause of allergic reactions. 7 of 10 checked products list polyethylene glycol or polysorbate; 3 do not.

Does not list polyethylene glycol or polysorbate

Lists polyethylene glycol or polysorbate

Ethosuximide without sorbitol or mannitol

Sorbitol or mannitol: sugar alcohols that can cause bloating or diarrhea in larger amounts. 3 of 10 checked products list sorbitol or mannitol; 7 do not.

Does not list sorbitol or mannitol

Lists sorbitol or mannitol

Ethosuximide without sugar (sucrose or dextrose)

Sugar (sucrose, dextrose): A consideration in diabetes, mostly in liquids and chewables. 3 of 10 checked products list sugar (sucrose or dextrose); 7 do not.

Does not list sugar (sucrose or dextrose)

Lists sugar (sucrose or dextrose)

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 Ethosuximide product suits you →

Common questions about Ethosuximide inactive ingredients

Is Ethosuximide gluten-free?
This page cannot certify any Ethosuximide product gluten-free; it reports what each label declares. Of the 10 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 Ethosuximide contain lactose?
No checked Ethosuximide 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 Ethosuximide contain soy?
1 of 10 checked Ethosuximide products list a soy ingredient (soybean oil or soy lecithin); 9 do not: Bionpharma (250 mg capsule), Bryant Ranch Prepack (250 mg capsule), Chartwell Governmental & Specialty RX (250 mg/5 mL oral solution) and Chartwell RX (250 mg capsule and 250 mg/5 mL oral solution) and 3 other companies. 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 Ethosuximide?
Every checked Ethosuximide product (10) 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 Ethosuximide contain gelatin?
7 of 10 checked Ethosuximide products list gelatin; 3 do not: Chartwell Governmental & Specialty RX (250 mg/5 mL oral solution), Chartwell RX (250 mg/5 mL oral solution) and Mylan (250 mg/5 mL oral solution). 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 Ethosuximide 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 Ethosuximide 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 Ethosuximide guide