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Fomepizole

Fomepizole Side Effects

Kristianne Hannemann, PharmDAllison Gourley, PharmD
Reviewed by Kristianne Hannemann, PharmD, Allison Gourley, PharmD
Last reviewed on September 25, 2023

The following side effects may get better over time as your body gets used to the medication. Let your healthcare provider know immediately if you continue to experience these symptoms or if they worsen over time.

Common Side Effects

  • Headache (14%)
  • Nausea (11%)
  • Dizziness (6%)
  • Drowsiness (6%)
  • Bad taste or metallic taste in the mouth (6%)

Less Common Side Effects

  • Stomach pain
  • Diarrhea
  • Low appetite
  • Pain during injection
  • Inflammation at injection site
  • Fever
  • Feeling drunk
  • Anxiety
  • Hiccups
  • Temporary blurred vision

Source: DailyMed

The following Fomepizole side effects have also been reported

Side effects that you should report to your care team as soon as possible:

Side effects that usually do not require medical attention (report to your care team if they continue or are bothersome):

  • Dizziness
  • Drowsiness
  • Headache
  • Metallic taste in mouth
  • Nausea
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