Proscar
✅ Treats Male Pattern Baldness
✅ Reduces Prostate Enlargement
✅ Lowers Urination Issues
✅ Decreases Surgery Risk
✅ Improves Urinary Flow
Proscar contains Finasteride
✓ Medisch beoordeeld door Morgan Ellis — Apotheekonderzoeker · 8 jaar ervaring · Laatst beoordeeld: mei 2026
💡 Snel antwoord
Proscar is finasteride, a 5-alpha-reductase inhibitor used to treat male-pattern baldness (5 mg (primarily BPH indication)) and benign prostatic hyperplasia (BPH). It blocks the conversion of testosterone to dihydrotestosterone (DHT) — the hormone that miniaturises hair follicles in genetically predisposed men. Daily dosing; takes 3–6 months for visible effect; effect reverses within 6–12 months of stopping.
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What Is Proscar?
Proscar is a branded generic of finasteride, a type-2 5-alpha-reductase inhibitor. Finasteride blocks the enzyme that converts testosterone into dihydrotestosterone (DHT) — the androgen responsible for follicle miniaturisation in androgenetic alopecia and for prostate growth in BPH.
Available strengths in this brand: 5 mg (primarily BPH indication). Manufactured by Merck.
Genitale herpes (eerste episode):
- Male-pattern baldness (androgenetic alopecia): 1 mg once daily — the hair-loss dose.
- Goedaardige prostaatvergroting (BPH): 5 mg once daily — the prostate dose. Reduces prostate volume, improves urinary symptoms, and reduces risk of acute urinary retention over 1–2 years.
- Hirsutism (female): off-label. Not FDA-approved for women of reproductive age — pregnancy risk (see contraindications).
How Finasteride Works for Hair
In genetically susceptible men, scalp follicles are exposed to DHT which causes them to progressively shrink, producing the thinning and recession pattern of androgenetic alopecia. Finasteride reduces scalp DHT by ~60%. Over 3–6 months, miniaturised follicles can recover, restoring thicker, longer hair shafts. Newly miniaturised follicles cannot recover — earlier treatment yields better outcomes.
Hoe in te nemen
- Swallow the tablet whole with a glass of water at roughly the same time each day. With or without food.
- Expect 3 months for initial signs (reduced shedding), 6 months for visible regrowth, en 12 months for peak response.
- Take it consistently — missing doses reduces DHT suppression. If you miss one, take as soon as you remember unless it is close to the next dose. Do not double-dose.
- Commit for at least 12 months before judging response. Many men abandon finasteride too early (3–4 months).
- Discontinuation reverses gains within 6–12 months. Lifetime use is the norm for maintained benefit.
Bijwerkingen
Common (1–2%): decreased libido, erectile dysfunction, reduced ejaculate volume, gynecomastia (breast tenderness / enlargement), mood changes.
Minder vaak: depression, anxiety, skin rash, testicular discomfort.
Post-finasteride syndrome (PFS): a contested but reported phenomenon where sexual, cognitive, or mood side effects persist after discontinuation. Incidence is low but real; men who experience sexual side effects while on finasteride should discuss stopping earlier rather than continuing and hoping symptoms resolve.
Most sexual side effects resolve within weeks of stopping the drug. Persistent effects are the concerning minority.
Who Should Not Take Proscar
- Women of reproductive age — finasteride is teratogenic (causes feminisation of male fetuses). Do not handle crushed or broken tablets if pregnant or trying to conceive.
- Known hypersensitivity to finasteride or dutasteride
- Caution in liver impairment — finasteride is hepatically cleared
- Monitor PSA on men taking 5 mg — finasteride lowers PSA ~50%, which can mask prostate cancer detection. Double PSA readings are the convention for interpretation.
Geneesmiddelinteracties
- PSA testing: finasteride halves PSA levels. Tell your clinician before any PSA check.
- Finasteride has few pharmacokinetic interactions; it is a substrate of CYP3A4 but blood levels of interacting drugs are typically unaffected.
- No significant interactions with hormonal contraceptives, antibiotics, or antihypertensives at standard doses.
Finasteride vs Dutasteride
Finasteride inhibits type-2 5-alpha-reductase only. Dutasteride inhibits both type-1 and type-2, resulting in ~90% DHT suppression (vs ~70% for finasteride) — somewhat stronger hair regrowth in trials, but with slightly higher sexual side effect risk and NOT FDA-approved for AGA in the US (off-label outside South Korea/Japan). See our full comparison: Finasteride vs Dutasteride.
Opslag
Store at room temperature (15–30 °C / 59–86 °F), away from moisture and light. Keep tablets in the original blister. Keep out of reach of children — particularly of women of reproductive age (teratogenic).
Veelgestelde vragen
Will Proscar fully stop my hair loss?
In 80–90% of men, finasteride halts further loss. In 60–70%, it produces visible regrowth. Response is best at the crown; hairline recession responds less reliably.
Hoelang duurt het voordat ik resultaten zie?
Expect ~3 months for reduced shedding, ~6 months for visible regrowth, and ~12 months for peak response. Abandoning before 12 months means you have not completed a fair trial.
What if I stop taking Proscar?
Hair gained reverts to baseline within 6–12 months of discontinuation. Ongoing benefit requires continuous daily use.
Is 1 mg really enough?
Yes — for hair loss. 1 mg/day is the FDA-approved and extensively-studied dose. The 5 mg formulation is the BPH dose and does not produce meaningfully better hair outcomes.
Can I combine Proscar with minoxidil?
Yes — highly recommended. Minoxidil + finasteride is the combination with the strongest evidence base for male-pattern baldness. They target different pathways and the effects are additive.
What about side effects?
About 1–2% of men report sexual side effects (libido, erectile function, ejaculate volume). Most resolve on stopping. Rare persistent post-finasteride syndrome (PFS) exists and is the reason some men prefer topical minoxidil alone.
Why must pregnant women avoid handling Proscar?
Finasteride is teratogenic — it can cause feminisation of a male fetus’s external genitalia if absorbed during pregnancy. Tablets are coated, so intact handling is safe, but crushed or broken tablets release powder. Store away from anyone pregnant.
Will Proscar affect PSA tests?
Yes — finasteride approximately halves PSA levels. Always tell your physician you are taking it before any PSA test. The convention is to double the measured PSA for interpretation in men on finasteride.
Does Proscar cause weight gain?
Not documented as a direct effect. Some men report weight shifts from associated changes in exercise or mood, but there is no pharmacological weight-gain mechanism.
Can I drink alcohol with Proscar?
No direct interaction. Moderate alcohol is generally fine. Very heavy drinking stresses the liver and may impact long-term finasteride metabolism, but day-to-day use does not require avoidance.
Gerelateerde producten & gidsen
- Finasteride vs Dutasteride Guide
- Minoxidil 5% vs 10% Guide
- Everything About Hair Loss
- How to Stop Hair Loss
- Can You Prevent Hair Loss?
- Tugain Foam (Minoxidil 5%)
- Tugain Solution (Minoxidil 10%)
⚕️ Medische disclaimer: Information on this page is for educational purposes and does not replace medical advice. Always consult a qualified clinician before starting, stopping, or changing any medication. Prescription products should be used only under medical supervision.
Zie ook: Minoxytop 5 mg — oral minoxidil for non-responders to topical — Curatio Healthcare 1.25 / 2.5 / 5 mg tablets.
Finasteride such as Proscar tackles androgenetic alopecia by blocking DHT, but minoxidil targets a second pathway — adding Minoxytop (oral minoxidil 5 mg) is the standard dual-mechanism protocol clinicians use for thicker regrowth than either drug achieves alone.
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More options in Hair Loss Treatment For Men
Gerangschikt op recente bestelvolumes van MedsBase — wat andere klanten in deze categorie kiezen.
| Sterkte | 5 mg |
|---|---|
| Hoeveelheid | 10 Tablet/s, 20 Tablet/s, 30 Tablet/s, 100 Tablet/s |
Proscar
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