I started Clen about 4 days ago and besides the usual symptoms I notice that I'm coughing more and getting more mucus up from the lungs -- I had a cold just as I started. And I remember reading somewhere that Clen can trigger asthma as well as treat it (I don't have it).
Doing a search on Clen and lung, I came up with an old post about a veterinary clen product (ventilim or something) which says that it opens up airways in horses and helps to stop them hacking. It also says it prompts more mucus secretion. So I guess it's alright.
Any one else have similar experience? Anything to worry about? When does it go away?