BLOKES taking a baldness medication have complained it shrunk their manhood.
Forty-one reported a smaller todger after using Finasteride, while more than 400 said they suffered impotence.
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A further 306 men moaned of losing interest in sex — while two said their libido had risen.
They were among 2,778 reports of side effects logged with the Medicine and Healthcare products Regulatory Agency.
Others included wonky willies or “man boobs”.
Scores more say the drug — often sold under the brand name Propecia — caused pain in their scrotums, flatulence, blurred vision or toothache.
Prescription-only pill Finasteride is one of the most common hair loss medications and is taken by tens of thousands in the UK alone.
It works by preventing testosterone turning into a hormone that can stop hair growing.
A Freedom of Information req-uest to drug watchdog MHRA also revealed there were 16 claims linking it to suicides and 200 people blamed it for depression.
Dr Alison Cave, MHRA chief safety officer, said: “Patient safety is our top priority.
“We have robust safety monitoring and surveillance systems in place for all healthcare products.
“When a safety issue is confirmed, we always act promptly to inform patients and healthcare professionals and take appropriate steps to mitigate any identified risk.
“It is important to note that a reaction reported to the Yellow Card Scheme does not necessarily mean it has been caused by the medicine, only that the reporter had a suspicion it may have.
“On the basis of the current evidence, the benefits of Finasteride outweigh the potential risks.”