Like has been said, there are plenty of people who run 100mgs of anavar. I think this is likely because people don't feel the side effects., although you'll most definitely notice it on your blood work.
But also, like has been said, start with 50mgs and then go up as needed. 50mgs should provide results. If it doesn't, then I would probably question the legitimacy/ the actual dosage of the product. 100mgs might provide more results but your HDL might drop to like 2.