Three-column list of common, uncommon, and severe withdrawal symptoms: Common - restlessness, irritability or anxiety; difficulty sleeping; nightmares; forgetfulness; cravings; soreness; nausea. Uncommon - vomiting; diarrhea; sensitivity to sound/light/touch; low mood or suicidal thoughts; fast or irregular heartbeat; heavy sweating or chills; shakes or tremors. Severe - high blood pressure; hallucinations; delusions and psychosis; seizures; confusion; disorientation; loss or consciousness.