Finasteride: uses, side effects & brands

Written & medically reviewed by Dr. Sanjay Anbu, MBBS · Last reviewed 5 November 2026

Finasteride shrinks an enlarged prostate and, at low dose, treats male hair loss. It belongs to the Urology & men’s health group. These treat prostate enlargement, urinary symptoms and erectile dysfunction.

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Drug type — dosing is set by your doctor

Measure	Range
Drug class	Urology & men’s health
Type	Prescription
Dose	Individual — ask your doctor or pharmacist

What it is used for

Enlarged prostate (BPH), to slowly shrink it
Reducing the risk of urinary retention and prostate surgery
Male-pattern hair loss (lower-strength form)

Common brand names

India: Finast, Fincar, Finpecia
Worldwide: Proscar, Propecia

Common side effects

Lower sex drive
Erection or ejaculation problems
Breast tenderness or enlargement
Low mood (uncommon)

Before taking it — precautions

Women who are or may be pregnant must not handle broken or crushed tablets (harm to a male baby)
It lowers the PSA blood test; tell your doctor before prostate testing
Tell your doctor about liver disease or a history of depression

When to see a doctor urgently

Breast lumps, pain or nipple discharge
Low mood or thoughts of self-harm (urgent)
Swelling of face, lips or throat (urgent)

Not a prescription — no dose shown. The right dose of finasteride depends on age, weight, kidney/liver function and the condition, so MedDroid does not show a dose here. Always get your dose from a doctor or pharmacist and the leaflet inside the pack. General educational information only.

Frequently asked questions

How long does finasteride take to work?

For the prostate, it usually takes several months to shrink it and ease symptoms. For hair loss, results also take months.

Will sexual side effects go away?

In most men they improve after stopping, but tell your doctor if they bother you.

Can women take finasteride?

It is not used in women who are or may become pregnant, and they should not handle broken tablets.

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Sources & further reading

Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.