Inactive ingredients by manufacturer

Methenamine inactive ingredients by manufacturer

Wondering whether your Methenamine 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 Methenamine 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 21 of the 21 current Methenamine products on the market today, from 17 companies listing it with the FDA, and lined them up side by side.

Ask about your bottle

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

  1. LactoseNo checked product

    No checked Methenamine product lists lactose.

  2. Wheat or gluten sourceDiffers by manufacturer

    2 of 21 checked products list a wheat or gluten source; 19 do not. See the products

    Does not list it Alvogen American Health Packaging ANI Aurobindo AvPAK Bryant Ranch Prepack Chartwell RX Golden State Medical Supply Ingenus Jubilant Cadista Micro NorthStar Rx Oncora Viona Westminster Zydus Lifesciences
    Lists it Edenbridge
  3. SoyNo checked product

    No checked Methenamine product lists soy.

  4. Synthetic dyesDiffers by manufacturer

    7 of 21 checked products list synthetic dyes; 14 do not. See the products

    Does not list it Alvogen American Health Packaging Aurobindo AvPAK Bryant Ranch Prepack Jubilant Cadista Micro NorthStar Rx Oncora Viona Westminster Zydus Lifesciences
    Lists it ANI Chartwell RX Edenbridge Golden State Medical Supply Ingenus
  5. GelatinNo checked product

    No checked Methenamine product lists gelatin.

Also listed by some products: Starch (source not stated) 1 of 21 Tartrazine 1 of 21 Titanium dioxide 8 of 21 Benzyl alcohol 1 of 21 PEG or polysorbate 6 of 21

1 product lists 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 Methenamine product and what its label lists

Hide products that list:

ProductListsInactive ingredients on the label
Alvogen Inc. 1 product
1 g tabletNDC 47781-0577-01 None of these listed
Show 3 ingredients

MAGNESIUM STEARATE, POVIDONE, UNSPECIFIED, SACCHARIN SODIUM
American Health Packaging 1 product
1000 mg tabletNDC 60687-0694-21 None of these listed
Show 3 ingredients

MAGNESIUM STEARATE, POVIDONE K90, SILICON DIOXIDE
ANI Pharmaceuticals, Inc. 1 product
1 g tabletNDC 70954-0959-10 Synthetic dyes Tartrazine (FD&C Yellow No. 5)
Show 4 ingredients

FD&C YELLOW NO. 5, MAGNESIUM STEARATE, POVIDONE K30, SACCHARIN SODIUM
Aurobindo Pharma Limited 1 product
1 g tabletNDC 65862-0782-01 None of these listed
Show 3 ingredients

MAGNESIUM STEARATE, POVIDONE, UNSPECIFIED, SACCHARIN SODIUM
AvPAK 1 product
1000 mg tabletNDC 50268-0549-15 None of these listed
Show 3 ingredients

MAGNESIUM STEARATE, POVIDONE K90, SILICON DIOXIDE
Bryant Ranch Prepack 2 products
500 mg tabletNDC 72162-2654-01 Titanium dioxide Polyethylene glycol or polysorbate
Show 11 ingredients

ARTHROSPIRA PLATENSIS, CARAMEL, CARMINIC ACID, CROSCARMELLOSE SODIUM, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, POLYETHYLENE GLYCOL, UNSPECIFIED, POLYVINYL ALCOHOL, UNSPECIFIED, SILICON DIOXIDE, TALC, TITANIUM DIOXIDE
1000 mg tabletNDC 72162-2655-01 Titanium dioxide Polyethylene glycol or polysorbate
Show 10 ingredients

CROSCARMELLOSE SODIUM, FERRIC OXIDE RED, FERRIC OXIDE YELLOW, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, POLYETHYLENE GLYCOL, UNSPECIFIED, POLYVINYL ALCOHOL, UNSPECIFIED, SILICON DIOXIDE, TALC, TITANIUM DIOXIDE
Chartwell RX, LLC 2 products
500 mg tabletNDC 62135-0200-01 Synthetic dyes Titanium dioxide Polyethylene glycol or polysorbate
Show 9 ingredients

CROSCARMELLOSE SODIUM, FD&C BLUE NO. 2--ALUMINUM LAKE, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, POLYETHYLENE GLYCOL, UNSPECIFIED, POLYVINYL ALCOHOL, UNSPECIFIED, SILICON DIOXIDE, TALC, TITANIUM DIOXIDE
1000 mg tabletNDC 62135-0201-01 Synthetic dyes Titanium dioxide Polyethylene glycol or polysorbate
Show 9 ingredients

CROSCARMELLOSE SODIUM, FD&C BLUE NO. 2--ALUMINUM LAKE, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, POLYETHYLENE GLYCOL, UNSPECIFIED, POLYVINYL ALCOHOL, UNSPECIFIED, SILICON DIOXIDE, TALC, TITANIUM DIOXIDE
Edenbridge Pharmaceuticals LLC. 2 products
500 mg tabletNDC 42799-0105-01 Wheat or gluten source Synthetic dyes Titanium dioxide
Show 12 ingredients

CALCIUM PHOSPHATE, DIBASIC, ANHYDROUS, CELLULOSE, MICROCRYSTALLINE, FD&C BLUE NO. 1, HYPROMELLOSES, MAGNESIUM ALUMINUM SILICATE, MAGNESIUM STEARATE, MALTODEXTRIN, MEDIUM-CHAIN TRIGLYCERIDES, POLYDEXTROSE, SILICON DIOXIDE, SODIUM STARCH GLYCOLATE TYPE A POTATO, TITANIUM DIOXIDE
1000 mg tabletNDC 42799-0106-01 Wheat or gluten source Synthetic dyes Titanium dioxide
Show 13 ingredients

CALCIUM PHOSPHATE, DIBASIC, ANHYDROUS, CELLULOSE, MICROCRYSTALLINE, FD&C RED NO. 40, FD&C YELLOW NO. 6, HYPROMELLOSES, MAGNESIUM ALUMINUM SILICATE, MAGNESIUM STEARATE, MALTODEXTRIN, MEDIUM-CHAIN TRIGLYCERIDES, POLYDEXTROSE, SILICON DIOXIDE, SODIUM STARCH GLYCOLATE TYPE A POTATO, TITANIUM DIOXIDE
Golden State Medical Supply, Inc. 1 product
1 g tabletNDC 51407-0880-01 Synthetic dyes
Show 5 ingredients

FD&C YELLOW NO. 6, MAGNESIUM STEARATE, POVIDONE, SACCHARIN SODIUM, SILICON DIOXIDE
Ingenus Pharmaceuticals, LLC 1 product
1 g tabletNDC 50742-0142-01 Synthetic dyes
Show 5 ingredients

FD&C YELLOW NO. 6, MAGNESIUM STEARATE, POVIDONE, SACCHARIN SODIUM, SILICON DIOXIDE
Jubilant Cadista Pharmaceuticals Inc. 1 product
1 g tabletNDC 59746-0797-01 Starch, source not stated
Show 5 ingredients

Magnesium Stearate, Microcrystalline Cellulose, Povidone, Unspecified, Silicon Dioxide, Sodium Starch Glycolate Type A
Micro Labs Limited 1 product
1000 mg tabletNDC 42571-0332-01 None of these listed
Show 3 ingredients

MAGNESIUM STEARATE, POVIDONE K90, SILICON DIOXIDE
NorthStar Rx LLC 1 product
1 g tabletNDC 72603-0816-01 None of these listed
Show 3 ingredients

MAGNESIUM STEARATE, POVIDONE, UNSPECIFIED, SACCHARIN SODIUM
Oncora Pharma, LLC 1 product
500 mg/5 mL oral solutionNDC 85477-0115-16 Benzyl alcohol
Show 4 ingredients

BENZYL ALCOHOL, SODIUM SACCHARIN, WATER, XANTHAN GUM
Viona Pharmaceuticals Inc 1 product
1 g tabletNDC 72578-0175-01 None of these listed
Show 5 ingredients

CROSPOVIDONE, UNSPECIFIED, MAGNESIUM STEARATE, POVIDONE, UNSPECIFIED, SACCHARIN SODIUM, SILICON DIOXIDE
Westminster Pharmaceuticals, LLC 2 products
500 mg tabletNDC 69367-0436-01 Titanium dioxide Polyethylene glycol or polysorbate
Show 11 ingredients

ARTHROSPIRA PLATENSIS, CARAMEL, CARMINIC ACID, CROSCARMELLOSE SODIUM, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, POLYETHYLENE GLYCOL, UNSPECIFIED, POLYVINYL ALCOHOL, UNSPECIFIED, SILICON DIOXIDE, TALC, TITANIUM DIOXIDE
1000 mg tabletNDC 69367-0437-01 Titanium dioxide Polyethylene glycol or polysorbate
Show 10 ingredients

CROSCARMELLOSE SODIUM, FERRIC OXIDE RED, FERRIC OXIDE YELLOW, MAGNESIUM STEARATE, MICROCRYSTALLINE CELLULOSE, POLYETHYLENE GLYCOL, UNSPECIFIED, POLYVINYL ALCOHOL, UNSPECIFIED, SILICON DIOXIDE, TALC, TITANIUM DIOXIDE
Zydus Lifesciences Limited 1 product
1 g tabletNDC 70771-1919-01 None of these listed
Show 5 ingredients

CROSPOVIDONE, UNSPECIFIED, MAGNESIUM STEARATE, POVIDONE, UNSPECIFIED, SACCHARIN SODIUM, SILICON 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.

Methenamine without a wheat or gluten source

Wheat or gluten source: wheat, barley or rye; a concern with celiac disease or wheat allergy. 2 of 21 checked products list a wheat or gluten source; 19 do not.

Does not list a wheat or gluten source

Lists a wheat or gluten source

Methenamine without synthetic dyes

Synthetic dyes: FD&C or D&C colorants and their aluminum lakes. 7 of 21 checked products list synthetic dyes; 14 do not.

Does not list synthetic dyes

Lists synthetic dyes

Methenamine without starch of unstated source

Starch, source not stated: the label says "starch" without naming corn, potato, tapioca or rice. 1 of 21 checked products list starch of unstated source; 20 do not.

Does not list starch of unstated source

Lists starch of unstated source

Methenamine 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. 1 of 21 checked products list tartrazine (FD&C Yellow No. 5); 20 do not.

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

Lists tartrazine (FD&C Yellow No. 5)

Methenamine without titanium dioxide

Titanium dioxide: A white colorant some people choose to avoid. 8 of 21 checked products list titanium dioxide; 13 do not.

Does not list titanium dioxide

Lists titanium dioxide

Methenamine without benzyl alcohol

Benzyl alcohol: A preservative, mostly in injections and liquids; not for newborns. 1 of 21 checked products list benzyl alcohol; 20 do not.

Does not list benzyl alcohol

Lists benzyl alcohol

Methenamine without polyethylene glycol or polysorbate

Polyethylene glycol or polysorbate: PEG, macrogol or polysorbate; a rare cause of allergic reactions. 6 of 21 checked products list polyethylene glycol or polysorbate; 15 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 Methenamine product suits you →

Common questions about Methenamine inactive ingredients

Is Methenamine gluten-free?
This page cannot certify any Methenamine product gluten-free; it reports what each label declares. Of the 21 products checked, 2 list a wheat, barley, rye or gluten ingredient (Edenbridge (500 mg tablet and 1000 mg tablet)), and 1 lists 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 Methenamine contain lactose?
No checked Methenamine 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 Methenamine contain soy?
No checked Methenamine 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 Methenamine?
7 of 21 checked Methenamine products list a synthetic dye (an FD&C or D&C colorant); 14 do not: Alvogen (1 g tablet), American Health Packaging (1000 mg tablet), Aurobindo (1 g tablet) and AvPAK (1000 mg tablet) and 8 other companies. Colorants often differ by strength within one company's line, so compare the lists above strength by strength.
Does Methenamine contain gelatin?
No checked Methenamine 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 Methenamine 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 August 28, 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 Methenamine products in the FDA's current NDC directory (openFDA), as of August 28, 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 Methenamine guide