Dutasteride — what it does, how to take it, and how to stay safe
Dutasteride is a prescription drug mainly used to treat benign prostatic hyperplasia (BPH). It can also be used off-label for male-pattern hair loss. It works slowly and can help shrink the prostate and ease urinary symptoms, or reduce hair loss over months. This page gives clear, practical facts so you can have a smarter conversation with your doctor or pharmacist.
How dutasteride works and common dosing
Dutasteride blocks 5-alpha reductase, the enzyme that converts testosterone into dihydrotestosterone (DHT). Lower DHT means less prostate growth and, over time, reduced hair loss. The usual dose is 0.5 mg once daily. Don't double up if you miss a dose; just take the next scheduled tablet. Expect gradual results — many men see prostate symptom improvement after about 3 months and clearer benefit by 6 to 12 months. For hair, visible change often takes 6 months or more.
Safety, side effects, and practical warnings
Common side effects are sexual: lower libido, erectile problems, and less ejaculate. Some men also report breast tenderness or enlargement. These effects can persist while you take the drug and sometimes after stopping it. Dutasteride lowers PSA levels — tell your doctor before a PSA test, since values will be affected.
Women who are pregnant or may become pregnant should not handle broken capsules or take dutasteride. The drug can harm a male fetus. If you’re a man whose partner is pregnant, take usual precautions and talk to your doctor.
Dutasteride is metabolized in the liver (CYP3A4). Strong CYP3A4 inhibitors or inducers can change blood levels, so check with your prescriber if you take antifungals, some antibiotics, or herbal supplements like St. John’s wort. Don’t combine dutasteride with finasteride or other 5-alpha reductase blockers unless your doctor advises it.
Before starting, tell your provider about prostate conditions, liver problems, or planned prostate cancer screening. If you notice persistent breast changes, new lumps, or nipple discharge, see a doctor right away.
Store dutasteride at room temperature and keep it away from children. Keep the blister packs intact — don’t let pregnant women touch crushed tablets.
Thinking about buying dutasteride online? Only use licensed pharmacies that require a valid prescription. Look for clear contact info, verified pharmacy seals, and real customer reviews. Be skeptical of prices that seem too low or sites that skip prescriptions. Ask your doctor for a preferred pharmacy or a legitimate Canadian pharmacy if you’re comparing cross-border options.
Finally, make a plan with your prescriber: agree on how long to try the drug, what changes to expect, and when to check PSA and side effects. That keeps things practical — you get help without surprises.
