I have been partaking since 2 weeks post op. And up to two weeks before the surgery. I lost 50 pounds preop, while smoking and 50 post op, while smoking.
I normally have a treat planned for my evening snack, the no sugar added fudgecicles or sugar free dark chocolate pudding, so I plan for possible munchies, most times I dont notice munchies though, depends on the strain of marijuana. Hope that helps.