"i was given this drug for severe throat pain after going to the er because the tylenol with codeine wasn&#039;t working. i took it that night and was blessed with a good nights sleep. the next day the pain was still severe so i kept taking it every 4 hours as prescribed but i could not stay awake. my last dose was last night and while it helped me sleep and took the pain away i woke up this morning still no pain but a migraine and vomiting and very bad sweats. i think my body is already going through withdrawals. so i have decided not to take it anymore. i still have the shakes and i feel numb and can&#039;t think straight at times."