Fomepizole Side Effects
Commonly reported side effects of fomepizole include: headache and nausea. Other side effects include: dizziness. See below for a comprehensive list of adverse effects.
For the Consumer
Applies to fomepizole: parenteral injection concentrate for iv infusion
Side effects include:
Headache, nausea, dizziness, increased drowsiness, bad/metallic taste.
For Healthcare Professionals
Applies to fomepizole: intravenous solution
The most common adverse events were headache, nausea, dizziness, increased drowsiness, and bad taste/metallic taste.[Ref]
Very common (10% or more): Nausea (11%)
Common (1% to 10%): Abdominal pain, vomiting, diarrhea, dyspepsia, heartburn[Ref]
Very common (10% or more): Headache (14%)
Common (1% to 10%): Dizziness, increased drowsiness, bad taste/metallic taste, lightheadedness, seizure, agitation, feeling drunk, vertigo, nystagmus, anxiety, "felt strange", decreased environmental awareness, abnormal smell, roar in ear[Ref]
Common (1% to 10%): Fever, multiorgan system failure, hangover, speech/visual disturbances[Ref]
Common (1% to 10%): Sinus bradycardia/bradycardia, phlebosclerosis, tachycardia, phlebitis, shock, hypotension[Ref]
Common (1% to 10%): Eosinophilia/hypereosinophilia, lymphangitis, disseminated intravascular coagulation, anemia[Ref]
Common (1% to 10%): Transient transaminitis[Ref]
Common (1% to 10%): Pain during injection, inflammation at injection site, application site reaction[Ref]
Common (1% to 10%): Anuria[Ref]
Common (1% to 10%): Hiccups, pharyngitis[Ref]
Common (1% to 10%): Transient blurred vision[Ref]
Common (1% to 10%): Facial flush, rash[Ref]
Common (1% to 10%): Lumbalgia/backache[Ref]
Common (1% to 10%): Decreased appetite
1. "Product Information. Antizol (fomepizole)." Jazz Pharmaceuticals, Palo Alto, CA.
Not all side effects for fomepizole may be reported. You should always consult a doctor or healthcare professional for medical advice. Side effects can be reported to the FDA here.
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- Drug class: antidotes
Other brands: Antizol
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