If you have more than one box, then split the tabs in the second box and up the dosage to 75mg. The total length could go to about 40 days safely, but 30 days seems adequate with the dosage like that. Personally, I'd just use 75mg after after 10 days at 50mg for only 30-35 days. If you only have one box, then use as directed, b/c I feel that the length of time is a contributing factor to decent Halodrol gains.