Take some real anavar instead of clen and do daily cardio you will achieve better results...
clen makes your heart rot

Tolerance does build up quick, but not as quick as 2 weeks as many people claim. The 2 weeks on 2 weeks off protocol is not the most efficient protocol. I personally found this protocol to work really well.

Week 1 20mcg a day
Week 2 40mcg a day
Week 3 60mcg a day
Week 4 80mcg a day

2wks on 2 off is actually the most beneficial way to run clen. Bursting clen, which is 2d on 2d off, is the most inefficient way to use clen and also the most strenuous on your body. You have to use higher doses doing it that way which places a lot of undue stress on your system and you have a lot of up and down activity which we all know is not good. If you are willing to risk the side effects of clen you should at least get the full fat burning potential from it. Bursting does not allow for that. You are not going to invent any new novel dosing protocol for clen, so stick with tried and true, 2wks on 2 off.

No matter how much you take or how you dose it, clen still isn't going to work unless you are monitoring your diet and controlling calories coupled with an effective workout plan. It is a pretty safe bet in my opinion that 95% of people using clen are doing it wrong and don't even warrant its use. They usually are currently overweight, not counting calories and think of it as a wonder fat loss drug. You will really only notice its benefits if you are already extremely lean and need to strip off the remaining fat that won't come off, like when doing a prep. If that is not your case then you are just risking sides for little benefit. The body is efficient at removing fat up to a certain point where it becomes resistant, that is the only time clen is beneficial.