anxiety
"Wasn't sleeping well and was having career-related anxiety.  I went to my PCP and he put me on Ambien and Lexapro.  I was very concerned about effect Lexapro would have on me, but I went ahead and started it.  First day I was a little tingly but no other immediate physical response.  The next morning I woke up retching/dry heaving.  I spent the whole day having hot and cold spells.  My ears were burning.  My head felt congested but without any sinus issues.  I was severely agitated/restless.  I couldn't sit still.  Felt sick all day.  I took the pill again the second morning (yesterday), but today woke up retching again.  Still very restless with some twitching of arms and legs.  Didn't take the medicine again today."