If you take anavar to gain weight, once you're done with a cycle do you lose everything you worked for if you stop working out?

Yes: Using anabolic steroids is not a healthy way to gain or maintain muscle mass. This is a Schedule III drug, possession and use without a valid prescription is illegal. In general if you stop working out you will lose muscle mass, no matter how much steroid you take, stopping both will lead to more loss of mass. If you are going to work that hard to gain, do it naturally and make it mean something