You should reduce the dose of Trapex 1mg Tablet gradually before completely stopping it. Suddenly stopping it may lead to withdrawal symptoms which include loss of the sense of reality, feeling detached from life, and unable to feel emotion. Some patients have also experienced numbness or tingling in the arms or legs, tinnitus (ringing sounds in the ears), uncontrolled or overactive movements, twitching, shaking, feeling sick, being sick, stomach upsets or stomach pain, loss of appetite, agitation and abnormally fast heart beats. It can also cause panic attacks, dizziness or feeling faint, memory loss, hallucinations, feeling stiff and unable to move easily, feeling very warm, convulsions (sudden uncontrolled shaking or jerking of the body) and oversensitivity to light, sound and touch.