Inactive ingredients by manufacturer

Perampanel inactive ingredients by manufacturer

Wondering whether your Perampanel 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 Perampanel 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 34 current Perampanel products on the market today, from 5 companies listing it with the FDA, and lined them up side by side.

Dr. Brian Staiger, PharmD, BCPS
Curated and coded by Dr. Brian Staiger, PharmD, BCPS, clinical pharmacist. The ingredient groups this page checks for (what counts as a gluten source, a synthetic dye, soy and so on) are his classification; the lists themselves are the manufacturers' own FDA labels. Updated October 6, 2026. Rebuilt daily from the FDA directory; labels re-read when the FDA publishes a new version.

Ask about your bottle

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

  1. LactoseDiffers by manufacturer

    30 of 34 checked products list lactose; 4 do not. See the products

    Does not list it Catalyst Eisai Novadoz Sun
    Lists it Catalyst Eisai Novadoz Sun Teva
  2. Wheat or gluten sourceNo checked product

    No checked Perampanel product lists a wheat or gluten source.

  3. SoyNo checked product

    No checked Perampanel product lists soy.

  4. Synthetic dyesDiffers by manufacturer

    12 of 34 checked products list synthetic dyes; 22 do not. See the products

    Does not list it Catalyst Eisai Novadoz Sun Teva
    Lists it Catalyst Eisai Novadoz Sun Teva
  5. GelatinNo checked product

    No checked Perampanel product lists gelatin.

Also listed by some products: Titanium dioxide 30 of 34 PEG or polysorbate 34 of 34 Sorbitol or mannitol 4 of 34

Find a version without it

Every current Perampanel product and what its label lists

Hide products that list:

Perampanel 2 mg tablet 5 companies Lactose 5 Titanium dioxide 5 Polyethylene glycol or polysorbate 5
CompanyListsInactive ingredients on the label
CatalystNDC 69616-0272-14 Lactose Titanium dioxide Polyethylene glycol or polysorbate
Show 10 ingredients

FERRIC OXIDE RED, FERRIC OXIDE YELLOW, HYPROMELLOSES, LACTOSE MONOHYDRATE, LOW-SUBSTITUTED HYDROXYPROPYL CELLULOSE (11% HYDROXYPROPYL; 120000 MW), MAGNESIUM STEARATE, POLYETHYLENE GLYCOL 8000, POVIDONE, TALC, TITANIUM DIOXIDE
EisaiNDC 62856-0272-14 Lactose Titanium dioxide Polyethylene glycol or polysorbate
Show 10 ingredients

FERRIC OXIDE RED, FERRIC OXIDE YELLOW, HYPROMELLOSES, LACTOSE MONOHYDRATE, LOW-SUBSTITUTED HYDROXYPROPYL CELLULOSE (11% HYDROXYPROPYL; 120000 MW), MAGNESIUM STEARATE, POLYETHYLENE GLYCOL 8000, POVIDONE, TALC, TITANIUM DIOXIDE
NovadozNDC 72205-0221-30 Lactose Titanium dioxide Polyethylene glycol or polysorbate
Show 11 ingredients

FERRIC OXIDE RED, FERRIC OXIDE YELLOW, HYPROMELLOSE 2910 (6 MPA.S), LACTOSE MONOHYDRATE, LOW-SUBSTITUTED HYDROXYPROPYL CELLULOSE, UNSPECIFIED, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE 101, MICROCRYSTALLINE CELLULOSE 102, POLYETHYLENE GLYCOL 6000, POVIDONE K30, TITANIUM DIOXIDE
SunNDC 51672-4204-03 Lactose Titanium dioxide Polyethylene glycol or polysorbate
Show 12 ingredients

FERRIC OXIDE RED, FERRIC OXIDE YELLOW, HYDROXYPROPYL CELLULOSE (1600000 WAMW), HYPROMELLOSE, UNSPECIFIED, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, POLYETHYLENE GLYCOL 6000, POVIDONE K30, TALC, TITANIUM DIOXIDE, WATER
TevaNDC 00480-7062-56 Lactose Titanium dioxide Polyethylene glycol or polysorbate
Show 12 ingredients

CROSPOVIDONE, FERRIC OXIDE RED, FERRIC OXIDE YELLOW, LACTOSE MONOHYDRATE, LOW-SUBSTITUTED HYDROXYPROPYL CELLULOSE, UNSPECIFIED, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, POLYETHYLENE GLYCOL 4000, POLYVINYL ALCOHOL, UNSPECIFIED, POVIDONE K30, TALC, TITANIUM DIOXIDE
Perampanel 4 mg tablet 5 companies Lactose 5 Titanium dioxide 5 Polyethylene glycol or polysorbate 5
CompanyListsInactive ingredients on the label
CatalystNDC 69616-0274-14 Lactose Titanium dioxide Polyethylene glycol or polysorbate
Show 9 ingredients

FERRIC OXIDE RED, HYPROMELLOSES, LACTOSE MONOHYDRATE, LOW-SUBSTITUTED HYDROXYPROPYL CELLULOSE (11% HYDROXYPROPYL; 120000 MW), MAGNESIUM STEARATE, POLYETHYLENE GLYCOL 8000, POVIDONE, TALC, TITANIUM DIOXIDE
EisaiNDC 62856-0274-14 Lactose Titanium dioxide Polyethylene glycol or polysorbate
Show 9 ingredients

FERRIC OXIDE RED, HYPROMELLOSES, LACTOSE MONOHYDRATE, LOW-SUBSTITUTED HYDROXYPROPYL CELLULOSE (11% HYDROXYPROPYL; 120000 MW), MAGNESIUM STEARATE, POLYETHYLENE GLYCOL 8000, POVIDONE, TALC, TITANIUM DIOXIDE
NovadozNDC 72205-0222-30 Lactose Titanium dioxide Polyethylene glycol or polysorbate
Show 11 ingredients

FERRIC OXIDE RED, HYPROMELLOSE 2910 (6 MPA.S), LACTOSE MONOHYDRATE, LOW-SUBSTITUTED HYDROXYPROPYL CELLULOSE, UNSPECIFIED, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE 101, MICROCRYSTALLINE CELLULOSE 102, POLYETHYLENE GLYCOL 6000, POVIDONE K30, TALC, TITANIUM DIOXIDE
SunNDC 51672-4205-02 Lactose Titanium dioxide Polyethylene glycol or polysorbate
Show 11 ingredients

FERRIC OXIDE RED, HYDROXYPROPYL CELLULOSE (1600000 WAMW), HYPROMELLOSE, UNSPECIFIED, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, POLYETHYLENE GLYCOL 6000, POVIDONE K30, TALC, TITANIUM DIOXIDE, WATER
TevaNDC 00480-7063-56 Lactose Titanium dioxide Polyethylene glycol or polysorbate
Show 11 ingredients

CROSPOVIDONE, FERRIC OXIDE RED, LACTOSE MONOHYDRATE, LOW-SUBSTITUTED HYDROXYPROPYL CELLULOSE, UNSPECIFIED, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, POLYETHYLENE GLYCOL 4000, POLYVINYL ALCOHOL, UNSPECIFIED, POVIDONE K30, TALC, TITANIUM DIOXIDE
Perampanel 6 mg tablet 5 companies Lactose 5 Titanium dioxide 5 Polyethylene glycol or polysorbate 5
CompanyListsInactive ingredients on the label
CatalystNDC 69616-0276-30 Lactose Titanium dioxide Polyethylene glycol or polysorbate
Show 10 ingredients

CELLULOSE, MICROCRYSTALLINE, FERRIC OXIDE RED, HYPROMELLOSES, LACTOSE MONOHYDRATE, LOW-SUBSTITUTED HYDROXYPROPYL CELLULOSE (11% HYDROXYPROPYL; 120000 MW), MAGNESIUM STEARATE, POLYETHYLENE GLYCOL 8000, POVIDONE, TALC, TITANIUM DIOXIDE
EisaiNDC 62856-0276-30 Lactose Titanium dioxide Polyethylene glycol or polysorbate
Show 10 ingredients

CELLULOSE, MICROCRYSTALLINE, FERRIC OXIDE RED, HYPROMELLOSES, LACTOSE MONOHYDRATE, LOW-SUBSTITUTED HYDROXYPROPYL CELLULOSE (11% HYDROXYPROPYL; 120000 MW), MAGNESIUM STEARATE, POLYETHYLENE GLYCOL 8000, POVIDONE, TALC, TITANIUM DIOXIDE
NovadozNDC 72205-0223-30 Lactose Titanium dioxide Polyethylene glycol or polysorbate
Show 10 ingredients

FERRIC OXIDE RED, HYPROMELLOSE 2910 (6 MPA.S), LACTOSE MONOHYDRATE, LOW-SUBSTITUTED HYDROXYPROPYL CELLULOSE, UNSPECIFIED, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE 101, MICROCRYSTALLINE CELLULOSE 102, POLYETHYLENE GLYCOL 6000, POVIDONE K30, TITANIUM DIOXIDE
SunNDC 51672-4206-02 Lactose Titanium dioxide Polyethylene glycol or polysorbate
Show 11 ingredients

FERRIC OXIDE RED, HYDROXYPROPYL CELLULOSE (1600000 WAMW), HYPROMELLOSE, UNSPECIFIED, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, POLYETHYLENE GLYCOL 6000, POVIDONE K30, TALC, TITANIUM DIOXIDE, WATER
TevaNDC 00480-7065-56 Lactose Titanium dioxide Polyethylene glycol or polysorbate
Show 11 ingredients

CROSPOVIDONE, FERRIC OXIDE RED, LACTOSE MONOHYDRATE, LOW-SUBSTITUTED HYDROXYPROPYL CELLULOSE, UNSPECIFIED, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, POLYETHYLENE GLYCOL 4000, POLYVINYL ALCOHOL, UNSPECIFIED, POVIDONE K30, TALC, TITANIUM DIOXIDE
Perampanel 8 mg tablet 5 companies Lactose 5 Titanium dioxide 5 Polyethylene glycol or polysorbate 5 Synthetic dyes 2
CompanyListsInactive ingredients on the label
CatalystNDC 69616-0278-30 Lactose Titanium dioxide Polyethylene glycol or polysorbate
Show 11 ingredients

CELLULOSE, MICROCRYSTALLINE, FERRIC OXIDE RED, FERROSOFERRIC OXIDE, HYPROMELLOSES, LACTOSE MONOHYDRATE, LOW-SUBSTITUTED HYDROXYPROPYL CELLULOSE (11% HYDROXYPROPYL; 120000 MW), MAGNESIUM STEARATE, POLYETHYLENE GLYCOL 8000, POVIDONE, TALC, TITANIUM DIOXIDE
EisaiNDC 62856-0278-30 Lactose Titanium dioxide Polyethylene glycol or polysorbate
Show 11 ingredients

CELLULOSE, MICROCRYSTALLINE, FERRIC OXIDE RED, FERROSOFERRIC OXIDE, HYPROMELLOSES, LACTOSE MONOHYDRATE, LOW-SUBSTITUTED HYDROXYPROPYL CELLULOSE (11% HYDROXYPROPYL; 120000 MW), MAGNESIUM STEARATE, POLYETHYLENE GLYCOL 8000, POVIDONE, TALC, TITANIUM DIOXIDE
NovadozNDC 72205-0224-30 Lactose Titanium dioxide Polyethylene glycol or polysorbate
Show 12 ingredients

FERRIC OXIDE RED, FERROSOFERRIC OXIDE, HYPROMELLOSE 2910 (6 MPA.S), LACTOSE MONOHYDRATE, LOW-SUBSTITUTED HYDROXYPROPYL CELLULOSE, UNSPECIFIED, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE 101, MICROCRYSTALLINE CELLULOSE 102, POLYETHYLENE GLYCOL 6000, POVIDONE K30, TALC, TITANIUM DIOXIDE
SunNDC 51672-4207-02 Lactose Synthetic dyes Titanium dioxide Polyethylene glycol or polysorbate
Show 13 ingredients

FD&C BLUE NO. 2, FD&C RED NO. 40, FERRIC OXIDE RED, HYDROXYPROPYL CELLULOSE (1600000 WAMW), HYPROMELLOSE, UNSPECIFIED, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, POLYETHYLENE GLYCOL 6000, POVIDONE K30, TALC, TITANIUM DIOXIDE, WATER
TevaNDC 00480-7066-56 Lactose Synthetic dyes Titanium dioxide Polyethylene glycol or polysorbate
Show 12 ingredients

CROSPOVIDONE, FD&C BLUE NO. 2 ALUMINUM LAKE, FERRIC OXIDE RED, LACTOSE MONOHYDRATE, LOW-SUBSTITUTED HYDROXYPROPYL CELLULOSE, UNSPECIFIED, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, POLYETHYLENE GLYCOL 4000, POLYVINYL ALCOHOL, UNSPECIFIED, POVIDONE K30, TALC, TITANIUM DIOXIDE
Perampanel 10 mg tablet 5 companies Lactose 5 Synthetic dyes 5 Titanium dioxide 5 Polyethylene glycol or polysorbate 5
CompanyListsInactive ingredients on the label
CatalystNDC 69616-0280-30 Lactose Synthetic dyes Titanium dioxide Polyethylene glycol or polysorbate
Show 11 ingredients

CELLULOSE, MICROCRYSTALLINE, FD&C BLUE NO. 2, FERRIC OXIDE YELLOW, HYPROMELLOSES, LACTOSE MONOHYDRATE, LOW-SUBSTITUTED HYDROXYPROPYL CELLULOSE (11% HYDROXYPROPYL; 120000 MW), MAGNESIUM STEARATE, POLYETHYLENE GLYCOL 8000, POVIDONE, TALC, TITANIUM DIOXIDE
EisaiNDC 62856-0280-30 Lactose Synthetic dyes Titanium dioxide Polyethylene glycol or polysorbate
Show 11 ingredients

CELLULOSE, MICROCRYSTALLINE, FD&C BLUE NO. 2, FERRIC OXIDE YELLOW, HYPROMELLOSES, LACTOSE MONOHYDRATE, LOW-SUBSTITUTED HYDROXYPROPYL CELLULOSE (11% HYDROXYPROPYL; 120000 MW), MAGNESIUM STEARATE, POLYETHYLENE GLYCOL 8000, POVIDONE, TALC, TITANIUM DIOXIDE
NovadozNDC 72205-0225-30 Lactose Synthetic dyes Titanium dioxide Polyethylene glycol or polysorbate
Show 11 ingredients

FD&C BLUE NO. 2, FERRIC OXIDE YELLOW, HYPROMELLOSE 2910 (6 MPA.S), LACTOSE MONOHYDRATE, LOW-SUBSTITUTED HYDROXYPROPYL CELLULOSE, UNSPECIFIED, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE 101, MICROCRYSTALLINE CELLULOSE 102, POLYETHYLENE GLYCOL 6000, POVIDONE K30, TITANIUM DIOXIDE
SunNDC 51672-4208-02 Lactose Synthetic dyes Titanium dioxide Polyethylene glycol or polysorbate
Show 12 ingredients

FD&C BLUE NO. 2, FERRIC OXIDE YELLOW, HYDROXYPROPYL CELLULOSE (1600000 WAMW), HYPROMELLOSE, UNSPECIFIED, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, POLYETHYLENE GLYCOL 6000, POVIDONE K30, TALC, TITANIUM DIOXIDE, WATER
TevaNDC 00480-7067-56 Lactose Synthetic dyes Titanium dioxide Polyethylene glycol or polysorbate
Show 12 ingredients

CROSPOVIDONE, FD&C BLUE NO. 2 ALUMINUM LAKE, FERRIC OXIDE YELLOW, LACTOSE MONOHYDRATE, LOW-SUBSTITUTED HYDROXYPROPYL CELLULOSE, UNSPECIFIED, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, POLYETHYLENE GLYCOL 4000, POLYVINYL ALCOHOL, UNSPECIFIED, POVIDONE K30, TALC, TITANIUM DIOXIDE
Perampanel 12 mg tablet 5 companies Lactose 5 Synthetic dyes 5 Titanium dioxide 5 Polyethylene glycol or polysorbate 5
CompanyListsInactive ingredients on the label
CatalystNDC 69616-0282-30 Lactose Synthetic dyes Titanium dioxide Polyethylene glycol or polysorbate
Show 10 ingredients

CELLULOSE, MICROCRYSTALLINE, FD&C BLUE NO. 2, HYPROMELLOSES, LACTOSE MONOHYDRATE, LOW-SUBSTITUTED HYDROXYPROPYL CELLULOSE (11% HYDROXYPROPYL; 120000 MW), MAGNESIUM STEARATE, POLYETHYLENE GLYCOL 8000, POVIDONE, TALC, TITANIUM DIOXIDE
EisaiNDC 62856-0282-30 Lactose Synthetic dyes Titanium dioxide Polyethylene glycol or polysorbate
Show 10 ingredients

CELLULOSE, MICROCRYSTALLINE, FD&C BLUE NO. 2, HYPROMELLOSES, LACTOSE MONOHYDRATE, LOW-SUBSTITUTED HYDROXYPROPYL CELLULOSE (11% HYDROXYPROPYL; 120000 MW), MAGNESIUM STEARATE, POLYETHYLENE GLYCOL 8000, POVIDONE, TALC, TITANIUM DIOXIDE
NovadozNDC 72205-0226-30 Lactose Synthetic dyes Titanium dioxide Polyethylene glycol or polysorbate
Show 11 ingredients

FD&C BLUE NO. 2, FERRIC OXIDE YELLOW, HYPROMELLOSE 2910 (6 MPA.S), LACTOSE MONOHYDRATE, LOW-SUBSTITUTED HYDROXYPROPYL CELLULOSE, UNSPECIFIED, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE 101, MICROCRYSTALLINE CELLULOSE 102, POLYETHYLENE GLYCOL 6000, POVIDONE K30, TITANIUM DIOXIDE
SunNDC 51672-4209-02 Lactose Synthetic dyes Titanium dioxide Polyethylene glycol or polysorbate
Show 11 ingredients

FD&C BLUE NO. 2, HYDROXYPROPYL CELLULOSE (1600000 WAMW), HYPROMELLOSE, UNSPECIFIED, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, POLYETHYLENE GLYCOL 6000, POVIDONE K30, TALC, TITANIUM DIOXIDE, WATER
TevaNDC 00480-7068-56 Lactose Synthetic dyes Titanium dioxide Polyethylene glycol or polysorbate
Show 11 ingredients

CROSPOVIDONE, FD&C BLUE NO. 2 ALUMINUM LAKE, LACTOSE MONOHYDRATE, LOW-SUBSTITUTED HYDROXYPROPYL CELLULOSE, UNSPECIFIED, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, POLYETHYLENE GLYCOL 4000, POLYVINYL ALCOHOL, UNSPECIFIED, POVIDONE K30, TALC, TITANIUM DIOXIDE
Perampanel 0.5 mg/mL oral suspension 4 companies Polyethylene glycol or polysorbate 4 Sorbitol or mannitol 4
CompanyListsInactive ingredients on the label
CatalystNDC 69616-0290-38 Polyethylene glycol or polysorbate Sorbitol or mannitol
Show 9 ingredients

ANHYDROUS CITRIC ACID, CARBOXYMETHYLCELLULOSE SODIUM, CELLULOSE, MICROCRYSTALLINE, DIMETHICONE, POLOXAMER 188, SILICON DIOXIDE, SODIUM BENZOATE, SORBITOL, WATER
EisaiNDC 62856-0290-38 Polyethylene glycol or polysorbate Sorbitol or mannitol
Show 9 ingredients

ANHYDROUS CITRIC ACID, CARBOXYMETHYLCELLULOSE SODIUM, CELLULOSE, MICROCRYSTALLINE, DIMETHICONE, POLOXAMER 188, SILICON DIOXIDE, SODIUM BENZOATE, SORBITOL, WATER
NovadozNDC 72205-0071-79 Polyethylene glycol or polysorbate Sorbitol or mannitol
Show 8 ingredients

ANHYDROUS CITRIC ACID, CARBOXYMETHYLCELLULOSE SODIUM, UNSPECIFIED, DIMETHICONE, UNSPECIFIED, MICROCRYSTALLINE CELLULOSE, POLOXAMER 188, SODIUM BENZOATE, SORBITOL SOLUTION, WATER
SunNDC 51672-4256-09 Polyethylene glycol or polysorbate Sorbitol or mannitol
Show 8 ingredients

ANHYDROUS CITRIC ACID, CARBOXYMETHYLCELLULOSE SODIUM, UNSPECIFIED, DIMETHICONE, MICROCRYSTALLINE CELLULOSE, NONCRYSTALLIZING SORBITOL SOLUTION, POLOXAMER 188, SODIUM BENZOATE, 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.

Perampanel without lactose

Lactose: milk sugar; a concern with lactose intolerance or a milk allergy. 30 of 34 checked products list lactose; 4 do not.

Show which Perampanel products list lactose and which do not, by product and company

Does not list lactose

Lists lactose

Perampanel without synthetic dyes

Synthetic dyes: FD&C or D&C colorants and their aluminum lakes. 12 of 34 checked products list synthetic dyes; 22 do not.

Show which Perampanel products list synthetic dyes and which do not, by product and company

Does not list synthetic dyes

Lists synthetic dyes

Perampanel without titanium dioxide

Titanium dioxide: A white colorant some people choose to avoid. 30 of 34 checked products list titanium dioxide; 4 do not.

Show which Perampanel products list titanium dioxide and which do not, by product and company

Does not list titanium dioxide

Lists titanium dioxide

Perampanel and polyethylene glycol or polysorbate

Polyethylene glycol or polysorbate: PEG, macrogol or polysorbate; a rare cause of allergic reactions. Every checked Perampanel product (34) lists polyethylene glycol or polysorbate.

Show which Perampanel products list polyethylene glycol or polysorbate and which do not, by product and company

Lists polyethylene glycol or polysorbate

Perampanel without sorbitol or mannitol

Sorbitol or mannitol: sugar alcohols that can cause bloating or diarrhea in larger amounts. 4 of 34 checked products list sorbitol or mannitol; 30 do not.

Show which Perampanel products list sorbitol or mannitol and which do not, by product and company

Does not list sorbitol or mannitol

Lists sorbitol or mannitol

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 Perampanel product suits you →

Common questions about Perampanel inactive ingredients

Is Perampanel gluten-free?
This page cannot certify any Perampanel product gluten-free; it reports what each label declares. Of the 34 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 Perampanel contain lactose?
30 of 34 checked Perampanel products list lactose; 4 do not: Catalyst (0.5 mg/mL oral suspension), Eisai (0.5 mg/mL oral suspension), Novadoz (0.5 mg/mL oral suspension) and Sun (0.5 mg/mL oral suspension). 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 Perampanel contain soy?
No checked Perampanel 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 Perampanel?
12 of 34 checked Perampanel products list a synthetic dye (an FD&C or D&C colorant); 22 do not: Catalyst (0.5 mg/mL oral suspension, 2 mg tablet and 4 mg tablet and 2 more), Eisai (0.5 mg/mL oral suspension, 2 mg tablet and 4 mg tablet and 2 more), Novadoz (0.5 mg/mL oral suspension, 2 mg tablet and 4 mg tablet and 2 more) and Sun (0.5 mg/mL oral suspension, 2 mg tablet and 4 mg tablet and 1 more) and 1 other company. Colorants often differ by strength within one company's line, so compare the lists above strength by strength.
Does Perampanel contain gelatin?
No checked Perampanel 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 Perampanel 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. The list is rebuilt every day, the FDA directory is re-imported every week, and each inactive-ingredient list is the manufacturer's FDA label as our label sync last read it, re-read when the FDA publishes a new version. 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 Perampanel 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 Perampanel guide