Former 100 metres world record holder Asafa Powell was banned for 18 months by a Jamaican anti-doping disciplinary panel yesterday after he tested positive for a banned substance last year.

The Jamaican sprinter, 31, tested positive for the stimulant oxilo-phrine at last year’s national championships and the ban has been backdated to June 21 2013 – the day he provided the sample. His ban will end on December 20.

Powell’s sanction comes two days after his former training partner Sherone Simpson received an 18-month suspension from the same panel for the same substance. Another Jamaican, Olympic discus thrower Allison Randall, was also handed a two-year ban for using the prohibited diuretic hydrochlorothiazide on Tuesday.

Powell had testified in January that Canadian physical trainer Chris Xuereb provided him with nine supplements, including Epiphany D1.

His legal team had presented three different laboratory reports that Epiphany D1 contained the stimulant oxilofrine.

However, Powell told the hearing that he had failed to list them as he could not remember their names.