Cognac and Choice Marijuana

Hi, a FOAF has a bottle of cognac and fine weed that he plans on smoking and drinking this thanksgiving. He also has a 10mg oxy and wants to know what would happen if he crushed the pill in the 750ml bottle of cognac. Would that be "safe" ? Would it be too weak to notice the effect ? thanks

Smoke the weed, sip the cognac, flush the oxy down the crapper.