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Allopurinol
Pronounced al-oh-PYOOR-i-nol
Brand names: Zyloprim
Type: Xanthine oxidase inhibitor (gout medicine) · All Other Medicines
What Allopurinol is used for
- Preventing gout attacks
- Preventing uric acid kidney stones
- Lowering uric acid during certain cancer treatments
◆ Kidney note
Cleared by the kidneys — the dose is lowered when kidney function is reduced; it also protects against uric acid stones.
Common side effects
- Rash
- Stomach upset
- Diarrhea
- Drowsiness
Important cautions
- Can cause a severe, life-threatening skin reaction — any new rash after starting should be reported immediately, and people of certain ancestries (including Han Chinese, Korean, and Thai) are tested for a risk gene first in many guidelines
- Starting it can temporarily trigger gout flares, so anti-inflammatory cover is often used at the start
How it comes
Tablets, injection (hospital). This guide lists forms only — it never lists strengths or doses.
Related medicines — Other Medicines
Condition guides on MedicalVideos.com
Please note: This page is a patient-education summary, not medical advice, and it deliberately contains no doses. Medicines affect everyone differently — always follow your own prescription and talk to your doctor or pharmacist before starting, stopping or changing any medicine.