I believe they say "you can attain the best cosmetic results from 3 times a week usage" but for AAS users, I find its just not enough. Taking AAS that puts your testosterone levels into supraphysiological levels, will, due to testosterone's conversion to DHT, put the levels of DHT up to supraphysiological levels. This will increase the amount of DHT binding to receptors on the scalp.
This long winded crap is just another way of saying that "AAS users should use nizoral shampoo every day." Though you should use it with a good conditioner, because nizoral can dry the living hell out of your hair.