Clonazepam Side Effects

While most people do not experience any problems while taking clonazepam, side effects can still occur. Common side effects of clonazepam include drowsiness, coordination problems, and behavior problems. In most cases, clonazepam side effects are minor and easily treated. However, be sure to seek immediate medical attention for more serious side effects, such as difficulty breathing, insomnia, or hallucinations.

 

An Introduction to Clonazepam Side Effects

As with any medicine, side effects are possible with clonazepam (Klonopin®). However, not everyone who takes the medication will experience side effects. In fact, most people tolerate it quite well. If side effects do occur, in most cases, they are minor and either require no treatment or are easily treated by you or your healthcare provider.
 
(This article covers many, but not all, of the possible side effects with clonazepam. Your healthcare provider can discuss a more complete list of clonazepam side effects with you.)
 

Common Clonazepam Side Effects

Clonazepam has been studied thoroughly in clinical trials in which the side effects of a group of people taking the drug are documented and compared to another group not taking the medicine. As a result, it is possible to see what side effects occur, how often they appear, and how they compare to the group not taking the medicine.
 
In these studies, the most common side effects of clonazepam included:
 
  • 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 clonazepam side effects (occurring in 1 to 10 percent of people) included:
 
  • Speech problems
  • A decreased sex drive
  • Confusion
  • Sinus infections
  • An irritated or runny nose
  • Coughing
  • Sore throat
  • Fatigue
  • Painful menstrual cramps
  • Sexual problems (see Klonopin Sexual Side Effects).
     
(Clonazepam Side Effects Continued: Page 2)
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Written by/reviewed by: Kristi Monson, PharmD; Arthur Schoenstadt, MD
Last reviewed by: Kristi Monson, PharmD;