Diclofenac Side Effects

Common Side Effects

Diclofenac has been studied thoroughly in clinical trials. In these studies, the side effects that occurred in a group of people taking diclofenac were documented and compared to side effects that occurred in another group of people using a placebo (a "sugar pill" with no active ingredients). This way, it is possible to see what diclofenac side effects occurred, how often they appeared, and how they compared to the placebo.
 
As would be expected, the side effects that were reported most commonly with diclofenac varied depending on the type of diclofenac product (oral forms, skin gel, skin patch, or eye drop).
 
In general, common side effects of the oral forms of diclofenac included:
 
  • Abdominal pain (or stomach pain)
  • Constipation
  • Diarrhea
  • Heartburn or indigestion (dyspepsia)
  • Gas
  • Nausea
  • Vomiting
  • Dizziness
  • Swelling
  • Ringing in the ears (tinnitus).
     
For the forms of diclofenac that are applied to the skin (gels, patches, and topical solution), skin irritation is the most common side effect. As would be expected, the most common side effects of the eye drop form of diclofenac were related to the eyes (eye inflammation, burning and stinging, and tear problems).
 

Final Thoughts

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