I have been having tightness in my chest every night for the couple of hours between taking my Lithium and before bed. When I take a deep breath it feels tight and I begin to cough. I don't have Asthma. This is brand new. It just occurred to me to check the side effects of Lithium and lo and behold an allergic reaction is tightness in the chest. Great. Another med I'll probably be yanked off of.

Growl.