Clonazepam Drug Side Effects

 Clonazepam (Klonopin®) is a medication often prescribed for the treatment of epileptic seizures and panic disorder. Although most people tolerate it well, as with any medication, side effects are possible. Problems that were most commonly reported during clinical studies include:
 
  • Drowsiness -- in up to 50 percent of people
  • Coordination problems -- up to 30 percent
  • Behavior problems -- up to 25 percent
  • Dizziness -- up to 12 percent
  • Upper respiratory tract infections (such as the common cold) -- up to 10 percent.
     
Other common side effects of clonazepam (occurring in 1 to 10 percent of people) include:
 
(Click Clonazepam Side Effects to learn about other possible side effects of the drug, including clonazepam's less common but potentially serious side effects.)
 
Written by/reviewed by: Kristi Monson, PharmD; Arthur Schoenstadt, MD
Last reviewed by: Kristi Monson, PharmD;