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‘Will Propecia Affect My Sperm Quality or Fertility?’

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PropeciaName: Mustapha

Question: I would like some advice as I have been taking the Propecia for a month now and have experienced some side effects such as a slight decrease in libido and semen not being as thick as it was previously. I am a happily married with children and have not in the past had any issues with libido.

Are these side effects something that I should be concerned about and therefore stop taking this drug or are these minor side effects that should decease after my body becomes used to the drug? My real concern and worry is, will taking Propecia have a damaging affect sperm morphology and limit my ability to have more children?

Answer: If you are a Belgravia Centre client we would generally advise you to consult with your hair loss specialist straight away if you believe you are experiencing these kinds of side effects. Generally, we would advise anyone in such circumstances to stop taking this medication.

The side effects of Propecia, such as the ones you mentioned, are possible although the incidence rate is considered rare (less than 2%).

In the clinical studies that proved Propecia (a popular brand name for finasteride 1mg) to be safe and effective for the treatment of hair loss in men, all side effects disappeared in men who stopped the treatment, and by the end of the study, the incidence of those side effects was less than 0.3% in men who continued this type of hair loss treatment. Decreased semen volume may equate to decreased sperm count, but this effect is believed to reverse once the medication has left the body.

Propecia should not be used when attempting to conceive, which is why we advise users to stop a week before trying for a baby. Propecia has a very short half-life, which means is will be out of your system seven days once you stop taking it. Most of the men involved in the clinical trials of Propecia were of childbearing age (18-41) and there have been no reports of fertility issues among them.

We recommend you discuss your concerns with whoever dispensed your hair loss medication. Should you wish to consider a minoxidil-only hair loss treatment course, this is an alternative option and one of our specialists would be happy to discuss this with you.

Further Reading:
Long-term Safety of Propecia
Propecia and DHT in Adult Males
Propecia Success Stories – How to Get Better Results

The Belgravia CentreThe Belgravia Centre

The Belgravia Centre is the leader in hair loss treatment in the UK, with two clinics based in Central London. If you are worried about hair loss you can arrange a free consultation with a hair loss expert or complete our Online Consultation Form from anywhere in the UK or the rest of the world. View our Hair Loss Success Stories, which are the largest collection of such success stories in the world and demonstrate the levels of success that so many of Belgravia’s patients achieve. You can also phone 020 7730 6666 any time for our hair loss helpline or to arrange a free consultation.


24th October, 2016 at 2:30 pm


It should be added that pregnant women should not get into contact with the pills or with the sperm of someone using it. There is a risk of damage to the child.

24th October, 2016 at 4:34 pm

Sarah Belgravia

Thanks Jonas. There is information on this throughout the site on pages with advice for women, as well as here.

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