I noticed light sensitivity, dizziness, anxiety, heart palpitations, nausea, hot and cold sensations, headache, decreased appetite, depression and insomnia during the withdraw process. The worse part is not being able to get more than two hours of sleep. I did not have any twitching. But sometimes I was scared and felt like something was seriously medically wrong. These symptoms decreased for me over time though. The medication was worth it in the end. It helped me in school during a difficult time in my life.