Inactive ingredients by manufacturer

Primidone inactive ingredients by manufacturer

Wondering whether your Primidone 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 Primidone 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 34 of the 42 current Primidone products on the market today, from 22 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. 6 labels have no inactive-ingredient list we could read, so those products cannot be compared.

Ask about your bottle

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

  1. LactoseDiffers by manufacturer

    33 of 34 checked products list lactose; 1 does not. See the products

    Does not list it Actavis
    Lists it Advagen American Health Packaging Aphena Pharma Solutions - Tennessee AvKARE AvPAK Bausch Health Bryant Ranch Prepack Carnegie Chartwell RX Direct Rx Dr. Reddy's Golden State Medical Supply Lannett NCS HealthCare of KY, LLC dba Vangard NorthStar Rx Oxford PD-Rx Proficient Rx TruPharma
  2. Wheat or gluten sourceNo checked product

    No checked Primidone product lists a wheat or gluten source.

  3. SoyNo checked product

    No checked Primidone product lists soy.

  4. Synthetic dyesDiffers by manufacturer

    3 of 34 checked products list synthetic dyes; 31 do not. See the products

    Does not list it Actavis Advagen American Health Packaging Aphena Pharma Solutions - Tennessee AvKARE AvPAK Bausch Health Bryant Ranch Prepack Carnegie Chartwell RX Direct Rx Dr. Reddy's Golden State Medical Supply Lannett NCS HealthCare of KY, LLC dba Vangard NorthStar Rx Oxford PD-Rx TruPharma
    Lists it Oxford PD-Rx Proficient Rx
  5. GelatinNo checked product

    No checked Primidone product lists gelatin.

Also listed by some products: Starch (source not stated) 8 of 34 Corn 3 of 34 Tartrazine 3 of 34

8 products list starch without a stated source. Most pharmaceutical starch is corn, but the label does not say, so it is flagged on its own.

Find a version without it

Every current Primidone product and what its label lists

Hide products that list:

ProductListsInactive ingredients on the label
Actavis Pharma, Inc. 1 product
250 mg tabletNDC 00591-5321-00 None of these listed
Show 7 ingredients

CELLULOSE, MICROCRYSTALLINE, DOCUSATE SODIUM, MAGNESIUM STEARATE, SILICON DIOXIDE, SODIUM BENZOATE, SODIUM STARCH GLYCOLATE TYPE A POTATO, STEARIC ACID
Advagen Pharma Limited 3 products
50 mg tabletNDC 72888-0045-01 Lactose Starch, source not stated
Show 8 ingredients

HYPROMELLOSE, UNSPECIFIED, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, SODIUM LAURYL SULFATE, SODIUM STARCH GLYCOLATE TYPE A, TALC, WATER
125 mg tabletNDC 72888-0160-00 Lactose Starch, source not stated
Show 8 ingredients

HYPROMELLOSE, UNSPECIFIED, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, SODIUM LAURYL SULFATE, SODIUM STARCH GLYCOLATE TYPE A, TALC, WATER
250 mg tabletNDC 72888-0046-01 Lactose Starch, source not stated
Show 8 ingredients

HYPROMELLOSE, UNSPECIFIED, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, SODIUM LAURYL SULFATE, SODIUM STARCH GLYCOLATE TYPE A, TALC, WATER
American Health Packaging 2 products
50 mg tabletNDC 68084-0202-01 Lactose
Show 5 ingredients

ACACIA, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, METHYLCELLULOSE (400 MPA.S), SODIUM STARCH GLYCOLATE TYPE A POTATO
250 mg tabletNDC 68084-0203-01 Lactose
Show 5 ingredients

ACACIA, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, METHYLCELLULOSE (400 MPA.S), SODIUM STARCH GLYCOLATE TYPE A POTATO
Amneal Pharmaceuticals LLC 2 products
50 mg tabletNDC 65162-0544-10 No inactive-ingredient list on the label No list we could read
250 mg tabletNDC 65162-0545-10 No inactive-ingredient list on the label No list we could read
Amneal Pharmaceuticals of New York LLC 2 products
50 mg tabletNDC 53746-0544-01 No inactive-ingredient list on the label No list we could read
250 mg tabletNDC 53746-0545-01 No inactive-ingredient list on the label No list we could read
Aphena Pharma Solutions - Tennessee, LLC 3 products
50 mg tabletNDC 71610-0763-60 Lactose
Show 5 ingredients

ACACIA, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, METHYLCELLULOSE (400 CPS), SODIUM STARCH GLYCOLATE TYPE A POTATO
50 mg tabletNDC 71610-0540-09 Lactose
Show 7 ingredients

Hypromellose 2910 (5 Mpa.S), Lactose Monohydrate, Magnesium Stearate, Microcrystalline Cellulose 101, Sodium Lauryl Sulfate, Sodium Starch Glycolate Type A Potato, Talc
50 mg tabletNDC 71610-0590-60 Lactose
Show 7 ingredients

HYPROMELLOSE 2910 (5 MPA.S), LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE 101, SODIUM LAURYL SULFATE, SODIUM STARCH GLYCOLATE TYPE A POTATO, TALC
AvKARE 2 products
50 mg tabletNDC 42291-0509-01 Lactose Corn-derived
Show 7 ingredients

CELLULOSE, MICROCRYSTALLINE, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, METHYLCELLULOSE (100 CPS), SODIUM LAURYL SULFATE, SODIUM STARCH GLYCOLATE TYPE A POTATO, STARCH, CORN
250 mg tabletNDC 42291-0511-01 Lactose Corn-derived
Show 7 ingredients

CELLULOSE, MICROCRYSTALLINE, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, METHYLCELLULOSE (100 CPS), SODIUM LAURYL SULFATE, SODIUM STARCH GLYCOLATE TYPE A POTATO, STARCH, CORN
AvPAK 2 products
50 mg tabletNDC 50268-0686-15 Still being read Not read yet
250 mg tabletNDC 50268-0687-15 Lactose Corn-derived
Show 7 ingredients

CELLULOSE, MICROCRYSTALLINE, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, METHYLCELLULOSE (100 CPS), SODIUM LAURYL SULFATE, SODIUM STARCH GLYCOLATE TYPE A POTATO, STARCH, CORN
Bausch Health US, LLC 2 products
50 mg tabletNDC 66490-0690-10 Lactose
Show 8 ingredients

lactose Monohydrate, Magnesium stearate, METHYLCELLULOSE (15 MPA.S), MICROCRYSTALLINE CELLULOSE, sodium lauryl sulfate, sodium starch glycolate type a potato, talc, WATER
250 mg tabletNDC 66490-0691-10 Lactose
Show 9 ingredients

ferric oxide yellow, lactose Monohydrate, Magnesium stearate, METHYLCELLULOSE (15 MPA.S), MICROCRYSTALLINE CELLULOSE, sodium lauryl sulfate, sodium starch glycolate type a potato, talc, WATER
Bryant Ranch Prepack 2 products
50 mg tabletNDC 71335-1965-01 Lactose
Show 7 ingredients

HYPROMELLOSE 2910 (5 MPA.S), LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE 101, SODIUM LAURYL SULFATE, SODIUM STARCH GLYCOLATE TYPE A POTATO, TALC
50 mg tabletNDC 63629-7811-01 No inactive-ingredient list on the label No list we could read
Carnegie Pharmaceuticals LLC 2 products
50 mg tabletNDC 80005-0117-11 Lactose Starch, source not stated
Show 8 ingredients

LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, METHYLCELLULOSE, UNSPECIFIED, MICROCRYSTALLINE CELLULOSE, SODIUM LAURYL SULFATE, SODIUM STARCH GLYCOLATE TYPE A, TALC, WATER
250 mg tabletNDC 80005-0118-11 Lactose Starch, source not stated
Show 8 ingredients

LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, METHYLCELLULOSE, UNSPECIFIED, MICROCRYSTALLINE CELLULOSE, SODIUM LAURYL SULFATE, SODIUM STARCH GLYCOLATE TYPE A, TALC, WATER
Chartwell RX, LLC 1 product
50 mg tabletNDC 62135-0468-90 Lactose
Show 5 ingredients

ACACIA, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, METHYLCELLULOSE (400 CPS), SODIUM STARCH GLYCOLATE TYPE A POTATO
Direct Rx 1 product
50 mg tabletNDC 72189-0216-60 Lactose
Show 7 ingredients

HYPROMELLOSE 2910 (5 MPA.S), LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE 101, SODIUM LAURYL SULFATE, SODIUM STARCH GLYCOLATE TYPE A POTATO, TALC
Dr. Reddy's Laboratories Limited 2 products
50 mg tabletNDC 55111-0477-01 Lactose
Show 6 ingredients

lactose monohydrate, magnesium stearate, sodium lauryl sulfate, sodium starch glycolate type A potato, talc, water
250 mg tabletNDC 55111-0476-01 Lactose
Show 7 ingredients

ferric oxide yellow, lactose monohydrate, magnesium stearate, sodium lauryl sulfate, sodium starch glycolate type A potato, talc, water
Golden State Medical Supply, Inc 2 products
50 mg tabletNDC 51407-0637-01 Lactose
Show 5 ingredients

ACACIA, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, METHYLCELLULOSE (400 CPS), SODIUM STARCH GLYCOLATE TYPE A POTATO
250 mg tabletNDC 51407-0638-01 Lactose
Show 5 ingredients

ACACIA, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, METHYLCELLULOSE (400 CPS), SODIUM STARCH GLYCOLATE TYPE A POTATO
Lannett Company, Inc. 2 products
50 mg tabletNDC 00527-1301-01 Lactose
Show 5 ingredients

ACACIA, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, METHYLCELLULOSE (400 CPS), SODIUM STARCH GLYCOLATE TYPE A POTATO
250 mg tabletNDC 00527-1231-01 Lactose
Show 5 ingredients

ACACIA, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, METHYLCELLULOSE (400 CPS), SODIUM STARCH GLYCOLATE TYPE A POTATO
NCS HealthCare of KY, LLC dba Vangard Labs 2 products
50 mg tabletNDC 00615-8206-30 No inactive-ingredient list on the label No list we could read
50 mg tabletNDC 00615-8664-39 Lactose
Show 7 ingredients

Hypromellose 2910 (5 Mpa.S), Lactose Monohydrate, Magnesium Stearate, Microcrystalline Cellulose 101, Sodium Lauryl Sulfate, Sodium Starch Glycolate Type A Potato, Talc
NorthStar Rx LLC 2 products
50 mg tabletNDC 72603-0609-01 Lactose Starch, source not stated
Show 8 ingredients

HYPROMELLOSE, UNSPECIFIED, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, SODIUM LAURYL SULFATE, SODIUM STARCH GLYCOLATE TYPE A, TALC, WATER
250 mg tabletNDC 72603-0610-01 Lactose Starch, source not stated
Show 8 ingredients

HYPROMELLOSE, UNSPECIFIED, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, SODIUM LAURYL SULFATE, SODIUM STARCH GLYCOLATE TYPE A, TALC, WATER
Oxford Pharmaceuticals, LLC 2 products
50 mg tabletNDC 69584-0684-10 Lactose
Show 7 ingredients

Hypromellose 2910 (5 Mpa.S), Lactose Monohydrate, Magnesium Stearate, Microcrystalline Cellulose 101, Sodium Lauryl Sulfate, Sodium Starch Glycolate Type A Potato, Talc
250 mg tabletNDC 69584-0685-10 Lactose Synthetic dyes Tartrazine (FD&C Yellow No. 5)
Show 9 ingredients

D&C Yellow No. 10 Aluminum Lake, Fd&C Yellow No. 5, Hypromellose 2910 (5 Mpa.S), Lactose Monohydrate, Magnesium Stearate, Microcrystalline Cellulose 101, Sodium Lauryl Sulfate, SODIUM STARCH GLYCOLATE TYPE A POTATO, Talc
PD-Rx Pharmaceuticals, Inc. 2 products
50 mg tabletNDC 72789-0178-01 Lactose
Show 7 ingredients

HYPROMELLOSE 2910 (5 MPA.S), LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE 101, SODIUM LAURYL SULFATE, SODIUM STARCH GLYCOLATE TYPE A POTATO, TALC
250 mg tabletNDC 72789-0177-01 Lactose Synthetic dyes Tartrazine (FD&C Yellow No. 5)
Show 9 ingredients

D&C YELLOW NO. 10 ALUMINUM LAKE, FD&C YELLOW NO. 5, HYPROMELLOSE 2910 (5 MPA.S), LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE 101, SODIUM LAURYL SULFATE, SODIUM STARCH GLYCOLATE TYPE A POTATO, TALC
Proficient Rx LP 2 products
50 mg tabletNDC 82804-0952-00 Still being read Not read yet
250 mg tabletNDC 82804-0953-00 Lactose Synthetic dyes Tartrazine (FD&C Yellow No. 5)
Show 9 ingredients

D&C Yellow No. 10 Aluminum Lake, Fd&C Yellow No. 5, Hypromellose 2910 (5 Mpa.S), Lactose Monohydrate, Magnesium Stearate, Microcrystalline Cellulose 101, Sodium Lauryl Sulfate, SODIUM STARCH GLYCOLATE TYPE A POTATO, Talc
TruPharma LLC. 1 product
125 mg tabletNDC 52817-0117-10 Lactose Starch, source not stated
Show 8 ingredients

HYPROMELLOSE, UNSPECIFIED, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, SODIUM LAURYL SULFATE, SODIUM STARCH GLYCOLATE TYPE A, TALC, WATER

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.

Primidone without lactose

Lactose: milk sugar; a concern with lactose intolerance or a milk allergy. 33 of 34 checked products list lactose; 1 does not.

Does not list lactose

Lists lactose

Primidone without synthetic dyes

Synthetic dyes: FD&C or D&C colorants and their aluminum lakes. 3 of 34 checked products list synthetic dyes; 31 do not.

Does not list synthetic dyes

Lists synthetic dyes

Primidone without starch of unstated source

Starch, source not stated: the label says "starch" without naming corn, potato, tapioca or rice. 8 of 34 checked products list starch of unstated source; 26 do not.

Does not list starch of unstated source

Lists starch of unstated source

Primidone without corn-derived ingredients

Corn-derived: corn starch, maize or corn syrup; a concern with corn allergy. 3 of 34 checked products list corn-derived ingredients; 31 do not.

Does not list corn-derived ingredients

Lists corn-derived ingredients

Primidone without tartrazine (FD&C Yellow No. 5)

Tartrazine (FD&C Yellow No. 5): flagged separately: labels must warn about it, and it can cause reactions in people sensitive to aspirin. 3 of 34 checked products list tartrazine (FD&C Yellow No. 5); 31 do not.

Does not list tartrazine (FD&C Yellow No. 5)

Lists tartrazine (FD&C Yellow No. 5)

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 Primidone product suits you →

Common questions about Primidone inactive ingredients

Is Primidone gluten-free?
This page cannot certify any Primidone product gluten-free; it reports what each label declares. Of the 34 products checked, none lists a wheat, barley, rye or gluten ingredient, and 8 list starch without a stated source (most pharmaceutical starch is corn, but the label does not say). If you have celiac disease, ask the manufacturer's medical information line for a written gluten statement for the lot you have.
Does Primidone contain lactose?
33 of 34 checked Primidone products list lactose; 1 does not: Actavis (250 mg tablet). 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 Primidone contain soy?
No checked Primidone 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 Primidone?
3 of 34 checked Primidone products list a synthetic dye (an FD&C or D&C colorant); 31 do not: Actavis (250 mg tablet), Advagen (50 mg tablet, 125 mg tablet and 250 mg tablet), American Health Packaging (50 mg tablet and 250 mg tablet) and Aphena Pharma Solutions - Tennessee (50 mg tablet) and 15 other companies. Colorants often differ by strength within one company's line, so compare the lists above strength by strength.
Does Primidone contain gelatin?
No checked Primidone 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 Primidone 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 Primidone 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 Primidone guide