So I've read that you can take clen longer for 2 weeks on/off if you add benadryl (25-50mg) in the 3rd week. Take it on the third week for one week and continue the clen as usual. How long can you run clen if you take benadryl every third week? I plan on running it for a total of 5 weeks.
I've yet to see any real proof that benadryl up regulates the receptors. I always use ketotifen. Keto is proven to work. Take at the end of second week of clen cycle. 1mg/day and take at night because it will make you drowsy. You can theoretically stay on clen indefinitely since the keto will up regulate the receptors. However, that is not advised. Also, after a few weeks you would probably have to up the keto dose to 2mg/day.
The problem with this is that it knocks your test levels down dramatically, so it counteracts any benefit you'd see from clen unless you're on cycle. Clen in general should be phased out. Albuterol will give you the same effects without the sides and without the gradual heart enlargement/scarring issues. If you're going to do it, stick to 2 weeks on/2 weeks off, and don't bother going above 120mcg.