I have got the best results with cycling clen 2 weeks on one week off and using benedryl. I have also used ketotifen and didnt notice a difference between the two.
My last cycle was like this
Week 1 -20mcg clen
week 2- 40 mcg clen
2 benedryl before bedtime
week 3 - No clen still 2 benedryl at night
week 4- 40 mcg clen
no benedryl
week 5- 60 mcg clen
2 benedryl at night