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In one study, the threshold dose by subcutaneous injection for endometrial transformation in rabbits was 0.003–0.01 mg for cyproterone acetate, 0.1–0.3 mg for drospirenone, 0.5 mg for progesterone, and 10–20 mg for spironolactone. [119]
Conversely, in studies of healthy men given high-dose spironolactone, gynecomastia occurred in 3 of 10 (30%) at 100 mg/day, in 5 of 8 (62.5%) at 200 mg/day, and in 6 of 9 (66.7%) at 400 mg/day, relative to none of 12 controls. [134] [135] The severity of gynecomastia with spironolactone varies considerably, but is usually mild. [110]
Spironolactone (SC-9420; Aldactone), another spirolactone, followed and had both good oral bioavailability and potency, and was the first antimineralocorticoid to be marketed. [ 1 ] [ 5 ] In addition to its antimineralocorticoid activity, SC-8109 shows potent progestogenic activity, with similar potency relative to that of progesterone . [ 6 ]
Spirolactones are a class of functional group in organic chemistry featuring a cyclic ester attached spiro to another ring system. The name is also used to refer to a class of synthetic steroids, called steroid-17α-spirolactones, 17α-spirolactosteroids, or simply 17α-spirolactones, which feature their spirolactone group at the C17α position.
The trial was stopped early because the beneficial effect of spironolactone on all-cause death exceeded the prespecified discontinuation requirements. Spironolactone reduced the risk of death by 30% compared to placebo. Additionally, there was a 35% reduction in the risk of hospitalization for worsening heart failure in the spironolactone group.
Canrenone is an active metabolite of spironolactone, canrenoic acid, and potassium canrenoate, and is considered to be partially responsible for their effects. [9] It has been found to have approximately 10 to 25% of the potassium-sparing diuretic effect of spironolactone, [ 16 ] whereas another metabolite, 7α-thiomethylspironolactone (7α-TMS ...
CYP3A3/4/5: 10 μg/kg Dolasetron: Indole: 5-HT 3 receptor antagonist 7–9 hours CYP 3A3/4/5, CYP2D6: 600 – 3000 μg/kg Palonosetron: Isoquinoline: 5-HT 3 receptor antagonist; highest affinity for 5-HT 3 receptor in this class 40 hours CYP1A2, CYP2D6, CYP3A3/4/5 [32] 0.25 mg dose Ramosetron: Benzimidazole derivative 5-HT 3 receptor antagonist ...
Unlike spironolactone, bicalutamide has no antimineralocorticoid activity, [97] and for this reason, has no risk of hyperkalemia (which can, rarely/in severe cases, result in hospitalization or death) [112] or other antimineralocorticoid side effects such as urinary frequency, dehydration, hypotension, hyponatremia, metabolic acidosis, or ...