First week is 5 mg of Anavar daily to test tolerance. Then move to 10 mg of anavar daily broken into 2 doses of 5 mg each about 12 hours apart. Max of 8 weeks on cycle and one week off cycle for each week on cycle is the normal rest period. This is how my wife ran it with no side effects whatsoever. She is now stepping her game way up and going into Primo.
Unless you are getting Anavar with a doctors script through a normal pharmacy like rite-aid, walgreens, ... Get a test kit and test what you get. As a female you can't take the risk of it being substituted for something else. Also make sure to buy the 10 mg tablets so you can just cut in half for 5 mg dosing. 40 mg tablets can't be cut down for accurate 5 mg dosing.
Anyone telling you to take 2.5 mg of Anavar does not understand the human body and oral steroids. By the time 2.5 mg of Anavar would work through the digestive system and get into your system you would be lucky if your body even noticed what was left.
Anavar and the low doses we are talking about really does not need support, but as a precaution I would take potassium and some kind of simple liver support supplement. Also since your going to be working out hard a womans multi-vitamin would not hurt either to make sure your getting all the nutrition you need.