yea, i havent heard of anything about cycling up then down. t4 is weaker then t3 so thats why im guessing people taper down on t3 but im on 200mcg of t4 right now with my hgh. i started at 50 mcg for 4 days, then 75 for 4 days, then 100, then 150, then 200 and i stayed at 200mcg for 2 weeks, now im tapering down. just cut the dose by half for example, 200, then 100, then 50, then 25. its better safe then sorry, dont want to take it for the rest of your life. hope this helps