Anavar is a derivative of DHT (Dihydrotestosterone) which causes it to be highly Anabolic and only mildly Androgenic, this means Anavar is good for building strength but not muscle mass, it also means Anavar is low in side effects. Steroids that are highly Androgenic such as Dianabol or Testosterone cause more side effects. This is an advantage for athletes such as powerlifters or sprinters who are looking to increase their performance without weight gain. A powerlifter who lifts in a certain weight category would want to get as strong as possible without moving up a weight class for obvious reasons.
The most common daily dose of Anapolon is 100mg, but even at that dosage side-effects like water-retention, elevated blood pressure, acne, hair loss, blood clotting changes, gynocomastia, liver toxicity and mood swings are very often reported. Using aromatase inhibitors to control estrogen aromatization will be ineffective as this drug does not directly convert into estrogen. It was suggested that oxymetholone can activate the estrogen receptor, similar to, but more profoundly than the estrogenic androgen methandriol. Supplements like Milk Thistle can be taken to help keep liver enzyme levels between safe ranges.