Key takeaways
Spironolactone (Aldactone) and finasteride (Proscar) are both prescription medications, but they serve different purposes and belong to different drug classes. Spironolactone is a potassium-sparing diuretic used to treat conditions like heart failure, high blood pressure, and swelling due to liver or kidney problems. It works by blocking aldosterone, which helps your kidneys remove extra water and sodium without lowering potassium levels. On the other hand, finasteride is a 5-alpha reductase inhibitor used to treat benign prostatic hyperplasia (BPH) in men. It works by blocking the conversion of testosterone to dihydrotestosterone (DHT), which helps shrink the prostate and ease urinary symptoms. Spironolactone can cause side effects like breast tenderness and lower sex drive, while finasteride may lead to sexual side effects such as difficulty having an erection and lower sex drive. Additionally, finasteride is not safe for pregnant women to handle, whereas spironolactone is not recommended during pregnancy due to potential harm to the baby. Both medications are available in lower-cost generic forms.
