PAINKILLER tramadol will top the agenda at an International Olympic Committee sports medicine conference next month, with calls growing for it to be banned by the World Anti-Doping Agency (Wada).

The narcotic-like drug is used to treat moderate to severe pain but has become popular with some cyclists who take it to numb leg pain towards the end of a race.

But tramadol, has been blamed for causing crashes, as dizziness and drowsiness are among its side effects.