Klonopin Side Effects

Common side effects of Klonopin include drowsiness, coordination problems, and behavior problems. Other less common side effects can include back pain, ear infections, and nosebleeds. While the side effects of Klonopin generally require little or no treatment, it is possible to experience more serious side effects while taking this medication. If you experience more serious Klonopin side effects, such as difficulty breathing, insomnia, or hallucinations, notify your healthcare provider immediately.

 

An Introduction to Klonopin Side Effects

As with any medicine, side effects are possible with Klonopin® (clonazepam). 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 Klonopin. Your healthcare provider can discuss a more complete list of Klonopin side effects with you.)
 

Common Klonopin Side Effects

Klonopin 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 Klonopin 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 Klonopin 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).
     
(Klonopin 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;