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Electrolyte imbalance is the major concern (see WARNINGS section). Symptoms reported include: polyuria, nausea, vomiting, weakness, lassitude, fever, flushed face, and hyperactive deep tendon reflexes. If hypotension occurs, it may be treated with pressor agents such as levarterenol to maintain blood pressure. Carefully evaluate the electrolyte pattern and fluid balance. Induce immediate evacuation of the stomach through emesis or gastric lavage. There is no specific antidote.
Reversible acute renal failure following ingestion of 50 tablets of a product containing a combination of 50 mg triamterene and 25 mg hydrochlorothiazide has been reported. Although triamterene is largely protein-bound (approximately 67%), there may be some benefit to dialysis in cases of overdosage.
Antikaliuretic Therapy and Potassium Supplementation: DYAZIDE (hydrochlorothiazide and triamterene) should not be given to patients receiving other potassium-sparing agents such as spironolactone, amiloride, or other formulations containing triamterene. Concomitant potassium-containing salt substitutes should also not be used.
Potassium supplementation should not be used with DYAZIDE (hydrochlorothiazide and triamterene) except in severe cases of hypokalemia. Such concomitant therapy can be associated with rapid increases in serum potassium levels. If potassium supplementation is used, careful monitoring of the serum potassium level is necessary.
Impaired Renal Function: DYAZIDE (hydrochlorothiazide and triamterene) is contraindicated in patients with anuria, acute and chronic renal insufficiency or significant renal impairment.
Hypersensitivity: Hypersensitivity to either drug in the preparation or to other sulfonamide-derived drugs is a contraindication.
Hyperkalemia: DYAZIDE (hydrochlorothiazide and triamterene) should not be used in patients with preexisting elevated serum potassium.This monograph has been modified to include the generic and brand name in many instances.
Last reviewed on RxList: 5/5/2011
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