Hair loss drugs can cause erectile dysfunction in men, scientists warn.
Those taking a popular growth stimulant were left impotent for an average of four years after finishing the medication, a study found.
Sufferers were left unable to maintain an erection despite being given Viagra to try and solve their problem.
Experts now say that taking finasteride is a bigger risk factor for the condition than diabetes, high blood pressure and smoking.
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Those taking a popular hair growth stimulant were left impotent for an average of four years after achieving hair growth, a study found
The drug, sold as Propecia, lowers prostate specific antigen levels and is used for treating male-pattern hair loss.
Researchers from Northwestern University Feinberg School of Medicine assessed the effects of the hair growth stimulant, taken by Donald Trump, and dutasteride.
