He consumed the drugs for about eight years, taking them at home on Saturdays so that the effects would wear off on Sunday and that he would be fit for work by Monday. SINGAPORE: A doctor who took methamphetamine for about eight years, consuming the drugs on Saturdays so the effects would wear off in time for work on Monday, has been sanctioned by a disciplinary tribunal. According to the grounds of decision published on Monday (Oct 13), Dr Leong Kok Cheong Darren was ordered to be de-