Assuming you're a man, you probably wont be happy with the effects of running a standalone with such a purely anabolic drug.
Anavar is one of only a small handful of AAS with clinical research supporting it's ability to boost the immune system. It is able to boost immunity because it suppresses endogenous testosterone production, but replaces essentially none of the androgenic qualities of testosterone. Androgens suppress immunity. So if you're a man your immune function will blossom after your testicles close up shop. However, your stamina may begin to drop and the psychological drive you need to get a good, hard workout is very likely to suffer. Sex drive will probably take a hit too. Boys need those androgens.