there's no autopsy report to back this up since it was doctored for 3 reasons:
1) bruce lee was a hero and no one at that time wanted him to be known for taking recreational, illegal drugs.
2) no one, especially, the hong kong gov't wanted a hashish epidemic on their hands (people copy-cating bruce)
3) life insurance payouts, if bruce was found to have died of recreational drug overdose, this would adversely affect life insurance payouts to his heirs.
so, the autopsy report had been tampered with for those above reasons. if you really want to know, maybe you can help me by contacting any hospital in Nepal and finding out the statistics on nepali hashish overdose or adverse symptoms from taking too much nepali hashish.