Side Effects of Quinine

Common Side Effects

For many medications, the prescribing information carefully explains the exact percentage of side effects that were seen in clinical trials. However, the prescribing information for almost all older medications, including quinine, include only vague information on potential side effects, with no percentages reported. Therefore, it can be difficult to know exactly how often the side effects of such medications occur.
 
Some of the most common quinine side effects may include but are not limited to:
 
  • Headaches
  • Dizziness
  • Sweating
  • Flushing, or a sudden redness and warmth of the skin
  • Nausea
  • Stomach cramps or pain
  • Diarrhea
  • Changes in hearing, including ringing in the ears and decreased hearing
  • Changes in vision, including blurred vision and problems distinguishing colors.
     

Final Thoughts

You may experience some or none of the side effects listed in this article. Unfortunately, there is no way for your healthcare provider to know beforehand if you will have problems with a medicine that you have never tried.
 
Therefore, make sure to let your healthcare provider know if you develop any side effects while taking the drug or if something "just does not seem right." While it may not be related to quinine, your healthcare provider will be able to diagnose and treat the problem.
 
 

Quinine Drug Information

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