It all depends on you personally. I dosed at 30mg per day, and suffered no side effects at all! Then again, my doctor says I have a really healthy, functional thyroid which may be a factor. Anyways, so yes, a lot of people report that they notice a kind of lethargy either during week 2-3 or week 3-4 with RAD140. But after that, it stars to level out and go away as your body adjusts to it. All that being said, everyone is different but I had no side effects with RAD140 whatsoever, aside from getting straight shredded, and sort of feeling like a god when in the gym lol. But we’re all different.
My suggestion would be, if you already started a cycle, continue through with it unless your side effects are getting in the way of day-to-day life; it may just be your body readjusting.
I personally ran RAD for 8 weeks, although I was feeling so good I wanted to go for 12, but I figured I would keep it standard for a first time cycle. It is hands down my favorite compound so far, and once finances permit, I’m going to run an 8 week cycle of RAD, with MK677 weeks 5-8 (1 month)