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Propecia contains finasteride, which blocks the type II 5-alpha-reductase enzyme. This enzyme converts testosterone into dihydrotestosterone (DHT). DHT binds to scalp hair follicles and causes them to miniaturize over time. By reducing DHT levels in the scalp by roughly 60-70%, finasteride slows follicle miniaturization and, in many men, promotes measurable regrowth.

Most men need to use Propecia consistently for at least 3 to 6 months before noticing reduced hair loss. Visible regrowth, when it occurs, typically becomes apparent after 12 months of continuous use. Stopping treatment generally results in reversal of any benefit within 12 months.

Propecia is FDA-approved for adult men with mild to moderate androgenetic alopecia (male pattern hair loss). It is most effective in men with hair thinning at the crown and mid-scalp. It is not approved for use in women or children, and it is contraindicated in women who are pregnant or may become pregnant due to the risk of fetal harm.

Clinical trials show that a small percentage of men (around 2-4%) experience sexual side effects such as decreased libido, erectile dysfunction, or reduced ejaculate volume. These effects are generally reversible upon discontinuation. Other reported effects include breast tenderness or enlargement. A physician will review your full medical history before prescribing.

Yes. Finasteride and minoxidil work through different mechanisms and are commonly used together. Finasteride reduces DHT at the follicle level while minoxidil promotes blood flow and prolongs the hair growth phase. Combining them may provide greater benefit than either treatment alone, though a physician will guide the appropriate regimen for your situation.

Yes. Finasteride lowers PSA levels by approximately 50% after 6 or more months of use. If you have a PSA test while taking Propecia, your physician or urologist should be informed so they can adjust interpretation of your result. This does not mean you can skip PSA screening; it means results need to be evaluated in context.

Doctronic uses an AI-powered evaluation to gather detailed information about your symptoms and medical history. A licensed physician then reviews your case, makes a clinical determination, and creates a personalized treatment plan. The entire process happens online, so you can get the care you need without an in-person visit.

Yes. Doctronic connects you with fully licensed physicians who review and approve every treatment plan. All consultations are HIPAA-compliant, and our clinical processes are regularly audited to ensure patient safety and quality of care. You receive physician-directed treatment, not just automated recommendations.