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Allopurinol - Side Effects, Precautions, and Contraindications

What side effects can Allopurinol cause?

The medication is generally well-tolerated. The most common side effects are:

  • Loose stools (diarrhea)
  • Stomach upset
  • Drowsiness (reported by patients occasionally but not common). Avoid driving or operating heavy machinery if it occurs

Before taking Allopurinol, what precautions must I follow?

What food or medicine must I avoid when I take Allopurinol?

  • Updated on Friday, June 12, 2015
  • Article contributed by Pharmacy, Rheumatology & Immunology Singapore General Hospital

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