Inactive ingredients by manufacturer

Letrozole inactive ingredients by manufacturer

Wondering whether your Letrozole 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 Letrozole 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 18 of the 24 current Letrozole products on the market today, from 20 companies listing it with the FDA, and lined them up side by side. 5 are still being read and will appear on a later visit. 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 Letrozole? 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 Letrozole products list lactose, a gluten source, soy, dyes or gelatin?

  1. LactoseEvery checked product

    Every checked Letrozole product (18) lists lactose. See the products

  2. Wheat or gluten sourceNo checked product

    No checked Letrozole product lists a wheat or gluten source.

  3. SoyNo checked product

    No checked Letrozole product lists soy.

  4. Synthetic dyesDiffers by manufacturer

    2 of 18 checked products list synthetic dyes; 16 do not. See the products

    Does not list it A-S Medication Solutions Accord Healthcare Atlantic Biologicals Aurobindo Avet AvPAK Breckenridge Bryant Ranch Prepack Carnegie Dr. Reddy's Golden State Medical Supply Natco Novartis NuCare
    Lists it AvKARE Proficient Rx
  5. GelatinNo checked product

    No checked Letrozole product lists gelatin.

Also listed by some products: Starch (source not stated) 2 of 18 Corn 13 of 18 Tartrazine 2 of 18 Titanium dioxide 14 of 18 PEG or polysorbate 15 of 18

2 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 Letrozole product and what its label lists

Hide products that list:

ProductListsInactive ingredients on the label
A-S Medication Solutions 2 products
2.5 mg tabletNDC 50090-8002-00 Lactose Corn-derived Polyethylene glycol or polysorbate
Show 11 ingredients

CELLULOSE, MICROCRYSTALLINE, CI 77492, CI 77891, HYPROMELLOSE 2910 (6 MPA.S), LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, POLYETHYLENE GLYCOL 8000, SILICA, SODIUM STARCH GLYCOLATE TYPE A POTATO, STARCH, CORN, TALC
2.5 mg tabletNDC 50090-3474-00 Still being read Not read yet
Accord Healthcare, Inc. 1 product
2.5 mg tabletNDC 16729-0034-10 Lactose Corn-derived Titanium dioxide Polyethylene glycol or polysorbate
Show 11 ingredients

CELLULOSE, MICROCRYSTALLINE, FERRIC OXIDE YELLOW, HYPROMELLOSE 2910 (6 MPA.S), LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, POLYETHYLENE GLYCOL 400, SILICON DIOXIDE, SODIUM STARCH GLYCOLATE TYPE A POTATO, STARCH, CORN, TALC, TITANIUM DIOXIDE
Atlantic Biologicals Corp. 1 product
2.5 mg tabletNDC 17856-0032-01 Lactose Corn-derived Titanium dioxide Polyethylene glycol or polysorbate
Show 11 ingredients

CELLULOSE, MICROCRYSTALLINE, FERRIC OXIDE YELLOW, HYPROMELLOSE 2910 (6 MPA.S), LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, POLYETHYLENE GLYCOL 400, SILICON DIOXIDE, SODIUM STARCH GLYCOLATE TYPE A POTATO, STARCH, CORN, TALC, TITANIUM DIOXIDE
Aurobindo Pharma Limited 1 product
2.5 mg tabletNDC 59651-0180-30 Lactose Corn-derived Titanium dioxide Polyethylene glycol or polysorbate
Show 11 ingredients

FERRIC OXIDE YELLOW, HYPROMELLOSE 2910 (6 MPA.S), LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE 101, POLYETHYLENE GLYCOL 3350, SILICON DIOXIDE, SODIUM STARCH GLYCOLATE TYPE A POTATO, STARCH, CORN, TALC, TITANIUM DIOXIDE
Avet Pharmaceuticals Inc. 1 product
2.5 mg tabletNDC 23155-0875-03 Lactose Starch, source not stated
Show 5 ingredients

HYPROMELLOSE 2208 (100 MPA.S), LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, SODIUM STARCH GLYCOLATE TYPE A
AvKARE 1 product
2.5 mg tabletNDC 42291-0374-30 Lactose Corn-derived Synthetic dyes Tartrazine (FD&C Yellow No. 5) Titanium dioxide Polyethylene glycol or polysorbate
Show 15 ingredients

FD&C BLUE NO. 2, FD&C YELLOW NO. 5, FERRIC OXIDE YELLOW, INDIGOTINDISULFONATE SODIUM, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, POLYETHYLENE GLYCOL 3350, POLYETHYLENE GLYCOL 4000, POLYVINYL ALCOHOL, UNSPECIFIED, SILICON DIOXIDE, SODIUM STARCH GLYCOLATE TYPE A POTATO, STARCH, CORN, TALC, TITANIUM DIOXIDE
AvPAK 1 product
2.5 mg tabletNDC 50268-0476-15 Lactose Corn-derived Titanium dioxide Polyethylene glycol or polysorbate
Show 11 ingredients

FERRIC OXIDE YELLOW, HYPROMELLOSE 2910 (6 MPA.S), LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, POLYETHYLENE GLYCOL 8000, SILICON DIOXIDE, SODIUM STARCH GLYCOLATE TYPE A POTATO, STARCH, CORN, TALC, TITANIUM DIOXIDE
Breckenridge Pharmaceutical, Inc. 1 product
2.5 mg tabletNDC 51991-0759-10 Lactose Corn-derived Titanium dioxide Polyethylene glycol or polysorbate
Show 11 ingredients

FERRIC OXIDE YELLOW, HYPROMELLOSE 2910 (6 MPA.S), LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, POLYETHYLENE GLYCOL 8000, SILICON DIOXIDE, SODIUM STARCH GLYCOLATE TYPE A POTATO, STARCH, CORN, TALC, TITANIUM DIOXIDE
Bryant Ranch Prepack 3 products
2.5 mg tabletNDC 71335-1526-01 Still being read Not read yet
2.5 mg tabletNDC 71335-2396-01 Lactose Starch, source not stated
Show 5 ingredients

HYPROMELLOSE 2208 (100 MPA.S), LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, SODIUM STARCH GLYCOLATE TYPE A
2.5 mg tabletNDC 63629-7819-01 Lactose Corn-derived Titanium dioxide Polyethylene glycol or polysorbate
Show 11 ingredients

FERRIC OXIDE YELLOW, HYPROMELLOSE 2910 (6 MPA.S), LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, POLYETHYLENE GLYCOL 400, SILICON DIOXIDE, SODIUM STARCH GLYCOLATE TYPE A POTATO, STARCH, CORN, TALC, TITANIUM DIOXIDE
Carnegie Pharmaceuticals LLC 1 product
2.5 mg tabletNDC 80005-0139-08 Lactose Titanium dioxide Polyethylene glycol or polysorbate
Show 10 ingredients

CROSCARMELLOSE SODIUM, FERRIC OXIDE YELLOW, HYPROMELLOSE 2910 (6 MPA.S), LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, POLYETHYLENE GLYCOL 3350, POVIDONE, SILICON DIOXIDE, TALC, TITANIUM DIOXIDE
Chartwell RX, LLC 1 product
2.5 mg tabletNDC 62135-0491-30 Still being read Not read yet
Dr. Reddy's Laboratories Limited 1 product
2.5 mg tabletNDC 55111-0646-30 Lactose Titanium dioxide Polyethylene glycol or polysorbate
Show 10 ingredients

croscarmellose sodium, ferric oxide yellow, hypromelloses, lactose monohydrate, magnesium stearate, Polyethylene Glycol, Unspecified, povidone, Silicon Dioxide, talc, titanium dioxide
Golden State Medical Supply, Inc. 1 product
2.5 mg tabletNDC 51407-0986-90 Lactose
Show 5 ingredients

CELLULOSE, MICROCRYSTALLINE, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, SILICON DIOXIDE, SODIUM STARCH GLYCOLATE TYPE A POTATO
Natco Pharma Limited 1 product
2.5 mg tabletNDC 63850-0025-01 Lactose Corn-derived Titanium dioxide Polyethylene glycol or polysorbate
Show 11 ingredients

CELLULOSE, MICROCRYSTALLINE, FERRIC OXIDE YELLOW, HYPROMELLOSES, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, POLYETHYLENE GLYCOL, SILICON DIOXIDE, SODIUM STARCH GLYCOLATE TYPE A POTATO, STARCH, CORN, TALC, TITANIUM DIOXIDE
Novartis Pharmaceuticals Corporation 1 product
2.5 mg tabletNDC 00078-0249-15 Lactose Corn-derived Titanium dioxide Polyethylene glycol or polysorbate
Show 11 ingredients

CELLULOSE, MICROCRYSTALLINE, FERRIC OXIDE YELLOW, HYPROMELLOSES, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, POLYETHYLENE GLYCOL, SILICON DIOXIDE, SODIUM STARCH GLYCOLATE TYPE A POTATO, STARCH, CORN, TALC, TITANIUM DIOXIDE
NuCare Pharmaceuticals,Inc. 2 products
2.5 mg tabletNDC 68071-5264-03 Lactose Corn-derived Titanium dioxide Polyethylene glycol or polysorbate
Show 11 ingredients

CELLULOSE, MICROCRYSTALLINE, FERRIC OXIDE YELLOW, HYPROMELLOSE 2910 (6 MPA.S), LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, POLYETHYLENE GLYCOL 400, SILICON DIOXIDE, SODIUM STARCH GLYCOLATE TYPE A POTATO, STARCH, CORN, TALC, TITANIUM DIOXIDE
2.5 mg tabletNDC 68071-2167-04 Lactose Corn-derived Titanium dioxide Polyethylene glycol or polysorbate
Show 11 ingredients

CELLULOSE, MICROCRYSTALLINE, FERRIC OXIDE YELLOW, HYPROMELLOSE 2910 (6 MPA.S), LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, POLYETHYLENE GLYCOL 400, SILICON DIOXIDE, SODIUM STARCH GLYCOLATE TYPE A POTATO, STARCH, CORN, TALC, TITANIUM DIOXIDE
Proficient Rx LP 1 product
2.5 mg tabletNDC 71205-0587-30 Lactose Corn-derived Synthetic dyes Tartrazine (FD&C Yellow No. 5) Titanium dioxide Polyethylene glycol or polysorbate
Show 15 ingredients

FD&C BLUE NO. 2, FD&C YELLOW NO. 5, FERRIC OXIDE YELLOW, INDIGOTINDISULFONATE SODIUM, LACTOSE MONOHYDRATE, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, POLYETHYLENE GLYCOL 3350, POLYETHYLENE GLYCOL 4000, POLYVINYL ALCOHOL, UNSPECIFIED, SILICON DIOXIDE, SODIUM STARCH GLYCOLATE TYPE A POTATO, STARCH, CORN, TALC, TITANIUM DIOXIDE
Teva Pharmaceuticals USA, Inc. 1 product
2.5 mg tabletNDC 00093-7620-56 Still being read Not read yet
Upsher-Smith Laboratories, LLC 1 product
2.5 mg tabletNDC 24979-0726-07 Still being read Not read yet
Yiling Pharmaceutical, Inc. 1 product
2.5 mg tabletNDC 69117-0004-01 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.

Letrozole and lactose

Lactose: milk sugar; a concern with lactose intolerance or a milk allergy. Every checked Letrozole product (18) lists lactose.

Lists lactose

Letrozole without synthetic dyes

Synthetic dyes: FD&C or D&C colorants and their aluminum lakes. 2 of 18 checked products list synthetic dyes; 16 do not.

Does not list synthetic dyes

Lists synthetic dyes

Letrozole without starch of unstated source

Starch, source not stated: the label says "starch" without naming corn, potato, tapioca or rice. 2 of 18 checked products list starch of unstated source; 16 do not.

Does not list starch of unstated source

Lists starch of unstated source

Letrozole without corn-derived ingredients

Corn-derived: corn starch, maize or corn syrup; a concern with corn allergy. 13 of 18 checked products list corn-derived ingredients; 5 do not.

Does not list corn-derived ingredients

Lists corn-derived ingredients

Letrozole 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. 2 of 18 checked products list tartrazine (FD&C Yellow No. 5); 16 do not.

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

Lists tartrazine (FD&C Yellow No. 5)

Letrozole without titanium dioxide

Titanium dioxide: A white colorant some people choose to avoid. 14 of 18 checked products list titanium dioxide; 4 do not.

Does not list titanium dioxide

Lists titanium dioxide

Letrozole without polyethylene glycol or polysorbate

Polyethylene glycol or polysorbate: PEG, macrogol or polysorbate; a rare cause of allergic reactions. 15 of 18 checked products list polyethylene glycol or polysorbate; 3 do not.

Does not list polyethylene glycol or polysorbate

Lists polyethylene glycol or polysorbate

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 Letrozole product suits you →

Common questions about Letrozole inactive ingredients

Is Letrozole gluten-free?
This page cannot certify any Letrozole product gluten-free; it reports what each label declares. Of the 18 products checked, none lists a wheat, barley, rye or gluten ingredient, and 2 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 Letrozole contain lactose?
Every checked Letrozole product (18) 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 Letrozole contain soy?
No checked Letrozole 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 Letrozole?
2 of 18 checked Letrozole products list a synthetic dye (an FD&C or D&C colorant); 16 do not: A-S Medication Solutions (2.5 mg tablet), Accord Healthcare (2.5 mg tablet), Atlantic Biologicals (2.5 mg tablet) and Aurobindo (2.5 mg tablet) and 10 other companies. Colorants often differ by strength within one company's line, so compare the lists above strength by strength.
Does Letrozole contain gelatin?
No checked Letrozole 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 Letrozole 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 Letrozole 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 Letrozole guide