Inactive ingredients by manufacturer

Tasimelteon inactive ingredients by manufacturer

Wondering whether your Tasimelteon 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 Tasimelteon 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 4 of the 5 current Tasimelteon products on the market today, from 4 companies listing it with the FDA, and lined them up side by side. 1 label has no inactive-ingredient list we could read, so that product cannot be compared.

Ask about your bottle

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

  1. LactoseDiffers by manufacturer

    3 of 4 checked products list lactose; 1 does not. See the products

    Does not list it Apotex
    Lists it Amneal Teva Vanda
  2. Wheat or gluten sourceNo checked product

    No checked Tasimelteon product lists a wheat or gluten source.

  3. SoyNo checked product

    No checked Tasimelteon product lists soy.

  4. Synthetic dyesEvery checked product

    Every checked Tasimelteon product (4) lists synthetic dyes. See the products

  5. GelatinEvery checked product

    Every checked Tasimelteon product (4) lists gelatin. See the products

Also listed by some products: Titanium dioxide 4 of 4 Carmine or shellac 2 of 4 Propylene glycol 2 of 4

Find a version without it

Every current Tasimelteon product and what its label lists

Hide products that list:

ProductListsInactive ingredients on the label
Amneal Pharmaceuticals NY LLC 1 product
20 mg capsuleNDC 69238-2548-03 Lactose Synthetic dyes Titanium dioxide Gelatin
Show 8 ingredients

CROSCARMELLOSE SODIUM, FD&C BLUE NO. 1, FD&C RED NO. 40, GELATIN, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, SILICON DIOXIDE, TITANIUM DIOXIDE
Apotex Corp. 1 product
20 mg capsuleNDC 60505-4665-03 Synthetic dyes Titanium dioxide Gelatin Carmine or shellac Propylene glycol
Show 13 ingredients

Croscarmellose Sodium, Fd&C Blue No. 1, Fd&C Red No. 3, Fd&C Yellow No. 6, GELATIN, UNSPECIFIED, Magnesium Stearate, MICROCRYSTALLINE CELLULOSE, POVIDONE, UNSPECIFIED, PROPYLENE GLYCOL, Shellac, SILICON DIOXIDE, Sodium Hydroxide, Titanium Dioxide
Teva Pharmaceuticals, Inc. 1 product
20 mg capsuleNDC 00480-4490-00 Lactose Synthetic dyes Titanium dioxide Gelatin Carmine or shellac Propylene glycol
Show 14 ingredients

ANHYDROUS LACTOSE, CROSCARMELLOSE SODIUM, FD&C BLUE NO. 1, FD&C RED NO. 40, FERROSOFERRIC OXIDE, GELATIN, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, POTASSIUM HYDROXIDE, PROPYLENE GLYCOL, SHELLAC, SILICON DIOXIDE, SODIUM LAURYL SULFATE, TITANIUM DIOXIDE
Vanda Pharmaceuticals Inc. 2 products
20 mg capsuleNDC 43068-0220-01 Lactose Synthetic dyes Titanium dioxide Gelatin
Show 10 ingredients

ANHYDROUS LACTOSE, CROSCARMELLOSE SODIUM, FD&C BLUE NO. 1, FD&C RED NO. 3, FD&C YELLOW NO. 6, GELATIN, UNSPECIFIED, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, SILICON DIOXIDE, TITANIUM DIOXIDE
4 mg/mL oral suspensionNDC 43068-0304-02 No inactive-ingredient list on the label No list we could read

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.

Tasimelteon without lactose

Lactose: milk sugar; a concern with lactose intolerance or a milk allergy. 3 of 4 checked products list lactose; 1 does not.

Does not list lactose

Lists lactose

Tasimelteon and synthetic dyes

Synthetic dyes: FD&C or D&C colorants and their aluminum lakes. Every checked Tasimelteon product (4) lists synthetic dyes.

Lists synthetic dyes

Tasimelteon and gelatin

Gelatin: animal-derived (usually bovine or porcine); a concern for vegetarian, kosher or halal needs. Every checked Tasimelteon product (4) lists gelatin.

Lists gelatin

Tasimelteon and titanium dioxide

Titanium dioxide: A white colorant some people choose to avoid. Every checked Tasimelteon product (4) lists titanium dioxide.

Lists titanium dioxide

Tasimelteon without carmine or shellac

Carmine or shellac: insect-derived red colorant or coating glaze. 2 of 4 checked products list carmine or shellac; 2 do not.

Does not list carmine or shellac

Lists carmine or shellac

Tasimelteon without propylene glycol

Propylene glycol: A solvent in liquids and capsules; a concern in kidney disease, for infants, and at high doses. 2 of 4 checked products list propylene glycol; 2 do 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 Tasimelteon product suits you →

Common questions about Tasimelteon inactive ingredients

Is Tasimelteon gluten-free?
This page cannot certify any Tasimelteon product gluten-free; it reports what each label declares. Of the 4 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 Tasimelteon contain lactose?
3 of 4 checked Tasimelteon products list lactose; 1 does not: Apotex (20 mg capsule). 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 Tasimelteon contain soy?
No checked Tasimelteon 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 Tasimelteon?
Every checked Tasimelteon product (4) 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 Tasimelteon contain gelatin?
Every checked Tasimelteon product (4) 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 Tasimelteon 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 Tasimelteon 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 Tasimelteon guide