Try the eca stack first and then take some time off and give the clen a try if the eca stack wasn't to hard on you, I find clen to have far more sides then the eca stack, I usually run ephedrine at 72mg caffeine at 200-400mg and 1 aspirin per day, I do this for 2 weeks and then stop because after two weeks I know longer feel high body temp or sides, I don't take benedryl i just take about 2 to 3 weeks off before I run it again. But don't jump right into the eca with high amounts of ephedrine work your way up to see where you can tolerate it. And don't over do it.