What are the side effects of Finasteride?

The Big Picture

Clinical studies show that Finasteride is well-tolerated by most men, with 98.6% of participants in trials experiencing no serious side effects. Here’s what you need to know:

Common Side Effects

A small percentage of men may experience mild effects that often resolve on their own, such as:

• Temporary dizziness
• Slight weakness
• Mild swelling in the hands

Sexual Side Effects

While widely discussed in the media, sexual side effects are rare:

• Occur in less than 2% of men
• Usually reversible if they do occur
• May include:
  • Changes in libido
  • Erectile function changes
  • Ejaculation changes

Important Context

When considering side effects, it’s important to note:

• Most reported sexual side effects are linked to the higher 5mg dose (used for prostate treatment), not the 1mg dose for hair loss
• No statistically significant link has been found between the 1mg dose and sexual side effects
• Most side effects resolve either while continuing treatment or after stopping

Monitoring Your Treatment

At MANUAL, we provide ongoing support throughout your treatment:

• Regular check-ins – Our clinical team monitors your progress
• Easy access to support – Message our clinicians through your account with any concerns
• Personalised care – We can adjust your treatment plan if needed

When to Seek Help

While serious side effects are extremely rare, support is always available:

• For mild concerns – Message our clinical team through your account
• For immediate support – Book a free consultation with our clinicians
• For urgent issues – Contact your GP

Everyone responds differently to medication. If you have any concerns, our clinical team is here to help.