Therapeutic Classification: antihypertensives
Pharmacologic Classification: aldosterone antagonists
Absorption: Well absorbed following oral administration.
Distribution: Unknown.
Metabolism/Excretion: Primarily metabolized by the liver via the CYP3A isoenzyme; <5% excreted unchanged by the kidneys.
Half-Life: 46 hr.
(antihypertensive effect)
ROUTE | ONSET | PEAK | DURATION |
---|
PO | unknown | 4 wk | unknown |
Hypertension
- PO (Adults ): 50 mg once daily initially; may ↑ to 50 mg twice daily; Concurrent use of moderate CYP3A4 inhibitors (erythromycin, verapamil, or fluconazole): 25 mg once daily initially; may ↑ to 25 mg twice daily.
Heart Failure with Reduced Ejection Fraction Post-Myocardial Infarction
- PO (Adults ): 25 mg daily once initially; ↑ in 4 wk to 50 mg once daily; Concurrent use of moderate CYP3A4 inhibitors (erythromycin, verapamil, or fluconazole): Do not exceed 25 mg once daily.