"i was on cymbalta for 5 days. it helped my anxiety, but i couldn&#039;t handle the side effects: nausea, extreme sleepiness and yawning for the better part of the day, feeling zombie-like, chills, clenching my jaw, headache. i stopped taking it after 5 days, and the withdrawal was terrible. i felt like i&#039;d been hit my a truck: terrible headache and clenching of jaw. and i&#039;d only been on 30 mg for 5 days. even if i could have tolerated the side effects, i would have been worried about the withdrawal."