What is the longest i can cycle steroids. I am currently on a 12 week cycle of sust and a 10 week cycle of deca. I am injecting twice a week at 1 1/2cc a shot(1cc of sust 1/2 deca). I would like to continue the cycle for just the sust. Whats the longest i can go. I am stopping the deca at week 10, but i would like to take the sust to 15 maybe 17 weeks. Suggestions