A Brazilian man suffered a never-before-seen reaction to an erection drug sold on Britain’s high streets. 

The 40-year-old developed pustules — small bumps on the skin containing fluid or pus — covering his chest, face and thighs after taking tadalafil, sold as Cialis in the UK. 

Doctors say medics should be aware of the ‘potential adverse reaction, considering the growing use of tadalafil’.

The unidentified man, who now lives in Portugal, denied taking any drugs when he originally visited his doctor complaining of the rash.

Five days later, when his condition worsened, he confessed to taking tadalafil.

The 40-year-old developed pustules — small bumps on the skin containing fluid or pus — covering his chest, face and 시알리스 효과 thighs after taking tadalafil, sold as Cialis in the UK. Pictured, pustules on his thigh

Doctors say medics should be aware of the ‘potential adverse reaction, 시알리스 효과 considering the growing use of tadalafil’. The unidentified man, who now lives in Portugal, denied taking any drugs when he originally visited his doctor complaining of the rash. Pictured, pustules on his chest 

Under UK regulations, Cialis can be sold over-the-counter but only in pharmacies for as little as £22, so that men are questioned about their health before they are sold the pills. This also means men cannot buy the drugs at corner shops, supermarkets or petrol stations — as is possible with aspirin and other drugs 

He told medics his symptoms began a few days after taking the drug to treat his ED.

The man stopped taking tadalafil and steroids eventually helped clear his skin. 

Manufacturers of the drug claim Cialis, sold for as little as £5 per pill, is superior to Viagra, made with sildenafil, because it works quicker, in just 30 minutes. 

Its effects can also last for up to 36 hours — six times longer than the little blue pill. 

Under UK regulations, Cialis can be sold over-the-counter but only in pharmacies, 시알리스 효과 so men are questioned about their health before they are handed the pills.