Wow Machine, I can't handle 150 mcg of clen. I don't use it any more. I've gone as high as 100 mcg in the past, and had constant shaking, sweating and got very little sleep while on. T3 does well for me, with few side effects. I've had a script for it in the past, due to a mild case of hypothyroidism (doctor put me on 12.5 mcg a day), when I was still natural.
In any event, 150 mcg is a rather heafy dose, and I wouldn't push it by going higher.