What Is Propecia?



Are you considering tackling hair loss and wondering what solutions are available here in the UK? One option that frequently comes up in conversation is Propecia. Aimed at men experiencing male pattern baldness and healthcare professionals alike, this comprehensive guide covers all you need to know about Propecia. Let’s dive in, shall we?

What is Propecia?

Definition and Main Use

Propecia is a branded hair loss medication containing finasteride as its active ingredient. Initially intended for treating an enlarged prostate, it has since gained approval from the MHRA (Medicines and Healthcare products Regulatory Agency) for treating male pattern baldness in the UK.

Chemical Composition (Finasteride)

Finasteride is a synthetic compound that acts on hormone levels in your body, particularly affecting the hormone conversion process linked to hair loss.

MHRA Approval and Legality

Unlike some hair loss solutions, Propecia is MHRA-approved and legally available in the UK through a prescription.

History of Propecia

Initial Uses

Before becoming the choice for many UK men seeking to regrow hair, finasteride was primarily used for treating benign prostatic hyperplasia (BPH).

Evolution to Hair Loss Treatment

An interesting side effect — hair growth — during BPH clinical trials led researchers to consider finasteride as a hair loss solution, subsequently leading to its approval for this use.

How Does Propecia Work?

Mechanism of Action

Propecia inhibits an enzyme called 5-alpha reductase, responsible for converting testosterone to dihydrotestosterone (DHT), which is known to cause hair loss.

Inhibition of 5-Alpha Reductase

By blocking this enzyme, Propecia significantly decreases DHT levels, thus slowing down or even reversing hair loss.

Effect on Testosterone and DHT

Although Propecia modifies hormonal activity, its effects are largely confined to the scalp, with limited systemic implications.

Expected Results

Timeframe for Effectiveness

Results are not instantaneous. Typically, UK users may notice an effect within three to six months of use.

Reversibility of Results

Should you stop taking Propecia, expect to lose any gained hair within a year.

Who Should Consider Propecia?

Target Demographics

Age Considerations

Generally recommended for adult men over 18, Propecia is most effective for those under 40.

Gender Considerations

Women, particularly those who are pregnant or may become pregnant, should avoid Propecia due to its hormonal effects.

Medical Pre-requisites

Previous Treatments

If you’ve already tried other hair loss treatments available in the UK, consult your GP or dermatologist before switching to Propecia.

Underlying Health Conditions

Disclose your full medical history to your healthcare provider to determine whether Propecia is a suitable treatment for you.

Pros and Cons of Using Propecia


Efficacy in Clinical Trials

Around 90% of men using Propecia report either new hair growth or halting of hair loss.

Convenience and Ease of Use

Taking just one tablet per day makes it a convenient option for many busy UK residents.


Potential Side Effects

Like all medications, this option can come with side effects, which we’ll explore next.

Long-term Commitment Required

Maintaining your newly-grown hair requires ongoing treatment, making this medication a long-term commitment both in terms of time and finances.

Side Effects and Precautions

Common Side Effects

Sexual Dysfunction

Some users report reduced libido, erectile dysfunction, or a decrease in semen volume.

Psychological Effects

Although less common, mood swings, depression, and anxiety are also potential side effects to be aware of.

Less Common, Serious Side Effects

Allergic Reactions

If you experience rashes, itching, or swelling, seek medical help immediately.

Interactions with Other Medications

Always inform your GP or healthcare provider of any other medications you’re taking.


Pregnancy and Women

Pregnant women should avoid handling crushed or broken tablets due to the risk of hormonal abnormalities in the foetus.

Alcohol and Substance Interaction

While there’s no direct interaction with alcohol, excessive drinking might enhance potential side effects.

Alternatives to Propecia

Other Medications


A topical treatment commonly known as Regaine in the UK, Minoxidil is less effective but available over-the-counter.


A stronger prescription medication similar to Propecia, requiring a GP consultation.

Surgical Options

Hair Transplant

Private hair loss clinics across the UK offer hair transplants as a more permanent, albeit costly, solution. These include FUE and FUT hair transplant.

Scalp Reduction

This less common surgical option involves removing bald areas of the scalp.

Natural Remedies

Essential Oils

Some UK residents turn to essential oils like lavender and rosemary, although their efficacy isn’t scientifically proven.

Herbal Supplements

Natural supplements like saw palmetto have garnered attention, but robust scientific evidence is lacking.

How to Get Propecia

Prescription Requirements

In the UK, you’ll need a prescription from a qualified GP or healthcare provider.

Over-the-Counter Options

Currently, there are no legitimate over-the-counter options in the UK.

Online Pharmacies and Telehealth

Various UK-based online healthcare platforms can issue prescriptions after an online consultation, but ensure they are registered and reputable.


Can Women Use Propecia?

This medication is generally not recommended for women due to potential hormonal imbalances and risk during pregnancy.

How Long Do I Need to Use Propecia for Results?

Generally, a 3-6 month period is required for noticeable results, but individual experiences may vary.

Can I Use Propecia and Minoxidil Together?

It’s possible to use both, but consult your healthcare provider for tailored advice.


Propecia has become a popular and widely used solution for male pattern baldness in the UK. However, it comes with its own set of pros and cons that you should consider. Always consult your healthcare provider to see if it’s the right fit for you.


Ready to turn back the clock? Book a consultation and we'll build a treatment plan tailored to your needs.

Book a Consultation Contact Us

Modern, Cosmetic, Hair & Skin Clinic