Prochlorperazine
"I was prescribed this drug to take along with Relpax for my severe migraines, which are often accompanied by terrible nausea. Within an hour after taking it, I began feeling horribly anxious, afraid, panicked and with a sense of impending doom. I couldn't sit still, and yet I felt groggy. I felt like I wanted to crawl out of my skin and worried that I was losing my mind. Sleeping was impossible, yet being awake was miserable. I couldn't concentrate, couldn't work and distract myself. A doctor finally prescribed an anti-anxiety medication, Klonopin, which eased the symptoms. But I felt this way for over 48 hours."