Medically reviewed by Drugs.com. Last updated on Jul 12, 2021.
Generic name: TRIAMTERENE 37.5mg, HYDROCHLOROTHIAZIDE 25mg
Dosage form: tablet
The usual dose of MAXZIDE-25 MG is one or two tablets daily, given as a single dose, with appropriate monitoring of serum potassium (see WARNINGS). The usual dose of MAXZIDE is one tablet daily, with appropriate monitoring of serum potassium (see WARNINGS). There is no experience with the use of more than one MAXZIDE tablet daily or more than two MAXZIDE-25 MG tablets daily. Clinical experience with the administration of two MAXZIDE-25 MG tablets daily in divided doses (rather than as a single dose) suggests an increased risk of electrolyte imbalance and renal dysfunction.
Patients receiving 50 mg of hydrochlorothiazide who become hypokalemic may be transferred to MAXZIDE (triamterene and hydrochlorothiazide) directly. Patients receiving 25 mg hydrochlorothiazide who become hypokalemic may be transferred to MAXZIDE-25 MG (37.5 mg triamterene/25 mg hydrochlorothiazide) directly.
In patients requiring hydrochlorothiazide therapy and in whom hypokalemia cannot be risked therapy may be initiated with MAXZIDE-25 MG. If an optimal blood pressure response is not obtained with MAXZIDE-25 MG, the dose should be increased to two MAXZIDE-25 MG tablets daily as a single dose, or one MAXZIDE tablet daily. If blood pressure still is not controlled, another antihypertensive agent may be added (see PRECAUTIONS: Drug Interactions).
Clinical studies have shown that patients taking less bioavailable formulations of triamterene and hydrochlorothiazide in daily doses of 25 mg to 50 mg hydrochlorothiazide and 50 mg to 100 mg triamterene may be safely changed to one MAXZIDE-25 MG tablet daily. All patients changed from less bioavailable formulations to MAXZIDE should be monitored clinically and for serum potassium after the transfer.
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