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Bismuth Subgallate

Generic name: bismuth subgallate systemic

Brand names: Stomax, Devrom

Dosage Forms

Excipient information presented when available (limited, particularly for generics); consult specific product labeling.

Tablet Chewable, Oral:

Devrom: 200 mg [banana flavor]


Mechanism of Action

Adsorbs extra water in large intestine, as well as toxins; forms a protective coat on the intestinal mucosa.



Bismuth is minimally absorbed across the GI tract (Lione 1988)

Use: Labeled Indications

Flatulence and feces deodorizer: Eliminating or reducing odor from flatulence and feces

Dosage and Administration

Dosing: Adult

Flatulence and feces deodorizer: Oral: 1 to 2 capsules or chewable tablets up to 4 times daily (maximum: 8 capsules or chewable tablets per 24 hours).

Dosing: Pediatric

Flatulence and feces deodorizer: Children ≥12 years and Adolescents: Oral: 1 to 2 capsules or chewable tablets up to 4 times daily; maximum daily dose: 8 capsules or chewable tablets/24 hours


Oral: Chewable tablets should be chewed thoroughly.


Store in a cool, dry place.

Drug Interactions

Bismuth Subcitrate: Bismuth-Containing Compounds may enhance the neurotoxic effect of Bismuth Subcitrate. Avoid combination

Adverse Reactions

Frequency not defined.

Gastrointestinal: Darkening of stools, melanoglossia


Other warnings/precautions:

  • Self-medication (OTC use): A temporary harmless darkening of the stool and/or tongue may occur with use. Bismuth subgallate does not reduce the odor due to faulty personal hygiene.

Patient Education

  • Discuss specific use of drug and side effects with patient as it relates to treatment. (HCAHPS: During this hospital stay, were you given any medicine that you had not taken before? Before giving you any new medicine, how often did hospital staff tell you what the medicine was for? How often did hospital staff describe possible side effects in a way you could understand?)
  • Patient may experience tongue discoloration or stool discoloration (HCAHPS).
  • Educate patient about signs of a significant reaction (eg, wheezing; chest tightness; fever; itching; bad cough; blue skin color; seizures; or swelling of face, lips, tongue, or throat). Note: This is not a comprehensive list of all side effects. Patient should consult prescriber for additional questions.

Intended Use and Disclaimer: Should not be printed and given to patients. This information is intended to serve as a concise initial reference for healthcare professionals to use when discussing medications with a patient. You must ultimately rely on your own discretion, experience and judgment in diagnosing, treating and advising patients.

Source: Wolters Kluwer Health. Last updated April 16, 2019.