Hi, Rosie!

OxyContin could cause constipation but I was fine, I think it may because I was also on antibiotics all these days which happened to have opposite effect.

My withdraw symptom was the panic feeling in the evening. I could not sleep at all for 4 nights, I felt short breath and racing heartbeat(I think this was called panic ?) . To me, daytime was fine. Another symptom I felt was muscle main all over my body and joint pain in both hands. Legs were very weak, had to go upstair slowly. Since I was taking OxyContin only for about 3 months, I was able to stop it without too much trouble. My dosage went from 20 mg/day to 60 mg/day and then back to 40mg /day.