i've started with clen last week and i'm doing the two week on/off cycle. I'm getting a worrying side effect though, i was doing a bit of cardio after my workout and i seemed to get out of breath more, my heartbeat was slightly faster than normal and i just stopped. The guy at the gym told me that it can't be clen 'cos clen should help my breathing even more. I'm due to do my usual 45 min cardio tomorow morning, should i cut it down or just proceed as normal?
(i'm on 4 tabs a day)