Venlafaxine Side Effects

Common Venlafaxine Side Effects

Venlafaxine has been studied thoroughly in clinical trials. In these studies, side effects are always documented and compared to side effects that occur in a another group of people not taking the medicine. This way, it is possible to see what side effects occur, how often they appear, and how they compare to the group not taking the medicine. Based on these studies, the most common side effects of venlafaxine include:
 
  • Nausea -- up to 58 percent of people
  • Headache -- up to 26.1 percent of people
  • Drowsiness -- up to 23 percent of people
  • Dry mouth -- up to 22 percent of people (see Effexor and Dry Mouth)
  • Dizziness -- up to 23.9 percent of people
  • Insomnia -- up to 22.5 percent of people (see Effexor and Insomnia)
  • Nervousness -- up to 21.3 percent of people
  • Loss of appetite -- 17 percent of people
  • Body weakness -- up to 16.9 percent of people
  • Sweating -- up to 19.3 percent of people
  • Constipation -- up to 15 percent of people
  • High blood pressure (hypertension) -- up to 13 percent of people
  • Ejaculation problems -- up to 12.5 percent of people (see Effexor Sexual Side Effects)
  • Anxiety -- up to 11.2 percent of people
  • Shakiness (tremors) -- up to 10.2 percent of people
  • Diarrhea -- up to 8 percent of people
  • Yawning -- up to 8 percent of people
  • Chills -- up to 6.8 percent of people
  • Vomiting -- up to 6.8 percent of people
  • Indigestion (dyspepsia) -- up to 6.7 percent of people
  • Impotence (also known as erectile dysfunction or just ED) -- up to 6 percent of people (see Effexor and Impotence)
  • Blurred vision -- up to 6 percent of people.

 

Other common venlafaxine side effects (occurring in 1 percent to 6 percent of people) include but are not limited to:
 

 

 
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Venlafaxine HCl

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