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Finasteride is a prescription medication licensed in the UK for the treatment of male pattern hair loss (androgenetic alopecia) in adult men.
Male pattern baldness is the most common cause of hair thinning in men and is driven largely by genetics and hormonal sensitivity. Finasteride works at a hormonal level to reduce the impact of DHT on the scalp.
When taken consistently, finasteride can help slow further hair loss and support the maintenance of existing hair.
Male pattern baldness is associated with sensitivity to dihydrotestosterone (DHT), a hormone derived from testosterone.
In genetically predisposed men, DHT binds to hair follicles and gradually causes them to shrink (miniaturise). Over time, this leads to:
-Thinner hair
-Shorter growth cycles
-Progressive recession or thinning
Finasteride works by inhibiting the type II 5-alpha-reductase enzyme responsible for converting testosterone into DHT. By lowering DHT levels in the scalp, finasteride helps reduce ongoing follicle miniaturisation.
Important to understand:
-It does not create new follicles
-It does not work instantly
-Treatment must be continued to maintain results
-Results vary between individuals
Hair growth cycles are slow, and visible changes typically take several months.
Finasteride is one of the most widely studied oral treatments for male pattern hair loss.
Clinical studies have shown that many men experience:
-Slowing of further hair loss
-Maintenance of existing hair
-In some cases, visible thickening
However, outcomes vary. The earlier treatment begins, the greater the likelihood of maintaining hair density.
Finasteride is licensed in the UK for male pattern hair loss and is generally considered the first-line oral treatment.
Dutasteride reduces DHT through dual enzyme inhibition but is not licensed in the UK for hair loss. A prescriber will assess whether finasteride is appropriate before considering alternative options.
Finasteride works internally by reducing DHT levels.
Minoxidil (such as Regaine) is a topical treatment applied directly to the scalp to stimulate hair follicles.
Some treatment plans combine oral finasteride with topical minoxidil. Your prescriber can advise whether combination treatment is appropriate.
As with all medications, finasteride may cause side effects in some individuals.
Reported side effects include:
-Reduced libido
-Erectile dysfunction
-Changes in ejaculation
-Mood changes
Most men do not experience significant side effects, and for many, any symptoms resolve after discontinuation. If you experience persistent or concerning symptoms, seek medical advice.
-For adult men aged 18 and over only
-Not suitable for women
-Women who are pregnant or may become pregnant must not handle crushed or broken tablets
-Not suitable for certain liver conditions
Always read the patient information leaflet provided with your medication.
If you miss a dose, take the next tablet as normal. Do not double dose.
Finasteride should be taken continuously to maintain its effect. Stopping treatment may result in the gradual return of hair thinning.
Active ingredient: Finasteride
Tablets also contain inactive ingredients required for formulation. Please refer to the patient information leaflet for the full ingredient list.
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Yes. Finasteride 1mg is licensed in the UK for the treatment of male pattern hair loss in adult men.
Visible improvement typically takes 3–6 months. Full assessment of benefit may take up to 12 months.
Finasteride is primarily used to slow further hair loss and maintain existing hair. Some men may notice thickening, but results vary.
If treatment is stopped, DHT levels will gradually return to previous levels, and hair thinning may resume over time.
Some men report reduced libido, erectile dysfunction or changes in ejaculation. These effects are uncommon and often reversible, but you should discuss any concerns with your prescriber.
Yes, finasteride is often used alongside topical minoxidil. Combination therapy may be discussed during your consultation.
