Dextromethorphan Side Effects

Other Possible 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 many dextromethorphan medications, contains only vague information on potential side effects, with no percentages provided. Therefore, it can be difficult to know exactly how common or how rare problems with such medications may be. In addition, the many different forms of dextromethorphan may have significantly different side effects.
Dextromethorphan is often found in combination with other medications. As a result, side effects you experience from taking a combination medicine could be due to dextromethorphan or the other medicines.
Some of the possible side effects of dextromethorphan are thought to include:
  • Drowsiness
  • Fatigue
  • Dizziness
  • Indigestion or heartburn
  • Lightheadedness
  • Nervousness or restlessness
  • Nausea
  • Vomiting.

Final Thoughts

You may experience some or none of the dextromethorphan 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 this drug or if something "just does not seem right." While it may not be related to the medication, your healthcare provider will be able to diagnose and treat the problem.
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Dextromethorphan Medication Information

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