Parents of the boys involved claimed the children had no idea what they were doing when they took the drug.
The spokesman added: 'As far as I know, the Viagra did not have its usual effect on the children.' 'However, they did not suffer any side-effects and they were fine. An ambulance service spokesman said: 'Their conditions were monitored regularly.
The pupils were taken to the Royal Berkshire Hospital, Reading. The six boys each took one of the blue tablets, but a classmate became concerned and alerted staff at the Forest School, Winnersh, Berkshire.
He has now been suspended from his high-achieving school for 'actions which placed other pupils at risk'. The youngster and five fellow pupils, all aged 12 and 13, were taken to hospital after swallowing the powerful anti-impotence drug. A boy took his father's Viagra tablets to school and handed them out to his friends during their lunch break.