I'm 5'4'', 115 lb female looking to just lose a few pounds. I just started on 40mcg of clen yesterday. My 200lb male friend started on the exact same dosage and clen. I have had no shakes at all, he is shaking like a leaf. I have had no side effects at all except for a little flushed face last night. I took 120 mcgs today and still have had no side effects. He took 80 mcg and is buzzing still! I have no idea what the deal is. Any ideas or suggestions? thanks!