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Gantanol

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Gantanol

Discontinued Warning IconPlease Note: This Brand Name drug is no longer available in the US.
(Generic versions may still be available.)

Gantanol

Gantanol Side Effects Center

Medical Editor: John P. Cunha, DO, FACOEP

Gantanol (sulfamethoxazole) is an antibacterial sulfonamide used to treat urinary tract infections (UTIs), meningitis, ear infections, and eye infections. The brand name of this medication is discontinued, but generic versions may be available. Common side effects include dizziness, headache, lethargy, diarrhea, anorexia, nausea, vomiting, and rash.

To treat severe Infections the dose of Gantanol is 4 tablets (2 g) initially, followed by 2 tablets (1 g) three times daily thereafter. Gantanol may interact with diuretics, anticoagulants, phenytoin, or methotrexate. Tell your doctor all medications and supplements you use. During pregnancy, Gantanol should be used only if prescribed. This drug passes into breast milk. Breastfeeding is not recommended while using this drug.

Our Gantanol (sulfamethoxazole) Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What is Prescribing information?

The FDA package insert formatted in easy-to-find categories for health professionals and clinicians.

Gantanol FDA Prescribing Information: Side Effects
(Adverse Reactions)

SIDE EFFECTS

Included in the listing that follows are adverse reactions that have not been reported with this specific drug; however, the pharmacologic similarities among the sulfonamides require that each of the reactions be considered with Gantanol (sulfamethoxazole) administration.

Hematologic: Agranulocytosis, aplastic anemia, thrombocytopenia, leukopenia, hemolytic anemia, purpura, hypoprothrombinemia, methemoglobinemia, neutropenia, eosinophilia.

Allergic Reactions: Anaphylaxis, allergic myocarditis, serum sickness, conjunctival and scleral injection, generalized allergic reactions. In addition, periarteritis nodosa and systemic lupus erythematosus have been reported.

Dermatologic: Stevens-Johnson syndrome, epidermal necrolysis, erythema multiforme, exfoliative dermatitis, photosensitivity, pruritus, urticaria, rash, generalized skin eruptions.

Gastrointestinal: Hepatitis, hepatocellular necrosis, pseudomembranous enterocolitis, pancreatitis, stomatitis, glossitis, nausea, emesis, abdominal pain, diarrhea, anorexia.

Genitourinary:Creatinine elevation, toxic nephrosis with oliguria and anuria. The frequency of renal complications is considerably lower in patients receiving the more soluble sulfonamides.

Neurologic: Convulsions, peripheral neuritis, ataxia, vertigo, tinnitus, headache.

Psychiatric: Hallucinations, depression, apathy.

Endocrine: The sulfonamides bear certain chemical similarities to some goitrogens, diuretics (acetazolamide and the thiazides) and oral hypoglycemic agents. Cross-sensitivity may exist with these agents. Diuresis and hypoglycemia have occurred rarely in patients receiving sulfonamides.

Musculoskeletal: Arthralgia, myalgia.

Respiratory: Pulmonary infiltrates.

Miscellaneous: Edema (including periorbital), pyrexia, chills, weakness, fatigue, insomnia.

Read the entire FDA prescribing information for Gantanol (Sulfamethoxazole) »

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Report Problems to the Food and Drug Administration

 

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.


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