id go 6 weeks... 3rd week of clen take 50 mg of benadryl everyday, this will allow you to go 6 weeks straight. as far as the t3 run it 6 weeks with the clen. it is important to dose the t3's right. use the 5/45/55 method. 5 % of the time should be spent ramping up , 45 % of the time should be spent at a max dose then 55% of the time should be spent ramping down. you dont wanna mess up your thyroid. be safe