It is understood one of the pupils, who are aged 12 and 13, brought the anti-impotency medication in from home and gave them to his friends.

The youngsters, from Forest Erectile pill
school in Winnersh, were taken to the Royal Berkshire Hospital in Reading, after teachers called the emergency services.

None are said to have suffered ill effects following the incident on 16 October.

But one of the boys will be “temporarily excluded for actions which placed other pupils at risk”.

Forest school has a strict no drugs policy.

A spokeswoman from Wokingham District Council, the local education authority said: “It is believed that a pupil brought the tablets from home into the all-boys school and shared them with five friends.

“The school responded quickly to the situation and, as a precaution, ups vardenafil were called.”

The spokesman added that all of the tablets have been accounted for.

Viagra, launched by the over the counter erectile dysfunction drug
company Pfizer in 1998, has been marketed as a breakthrough in treating impotency.

Despite being sold on the internet, it is a prescribed drug.