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No specific data are available regarding MAXZIDE (triamterene and hydrochlorothiazide) overdosage in humans and no specific antidote is available.
Fluid and electrolyte imbalances are the most important concern. Excessive doses of the triamterene component may elicit hyperkalemia, dehydration, nausea, vomiting and weakness and possibly hypotension. Overdosing with hydrochlorothiazide has been associated with hypokalemia, hypochloremia, hyponatremia, dehydration, lethargy (may progress to coma) and gastrointestinal irritation. Treatment is symptomatic and supportive. Therapy with MAXZIDE (triamterene and hydrochlorothiazide) should be discontinued. Induce emesis or institute gastric lavage. Monitor serum electrolyte levels and fluid balance.
Institute supportive measures as required to maintain hydration, electrolyte balance, respiratory, cardiovascular and renal function.
MAXZIDE (triamterene and hydrochlorothiazide) should not be used in the presence of elevated serum potassium levels (greater than or equal to 5.5 mEq/liter). If hyperkalemia develops, this drug should be discontinued and a thiazide alone should be substituted.
Antikaliuretic Therapy or Potassium Supplementation
MAXZIDE should not be given to patients receiving other potassium-conserving agents such as spironolactone, amiloride hydrochloride or other formulations containing triamterene. Concomitant potassium supplementation in the form of medication, potassium-containing salt substitute or potassium-enriched diets should also not be used.
Impaired Renal Function
MAXZIDE is contraindicated in patients with anuria, acute and chronic renal insufficiency or significant renal impairment.
MAXZIDE should not be used in patients who are hypersensitive to triamterene or hydrochlorothiazide or other sulfonamide-derived drugs.
Last reviewed on RxList: 5/17/2011
This monograph has been modified to include the generic and brand name in many instances.
Additional Maxide Information
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