# Allopurinol (Zyloprim)

Source: https://ourhealthnetwork.com/drugs/allopurinol
Data: FDA Orange Book and OpenFDA, refreshed periodically

## What is Allopurinol?

Allopurinol (brand name: Zyloprim) is a xanthine oxidase inhibitor (gout). It is prescribed to treat gout. Across the United States, 176,000 doctors prescribe Allopurinol to approximately 1.9 million Medicare patients, making it one of the 50 most prescribed drugs in America.

## Brand names

Zyloprim

## Indications

Allopurinol is primarily prescribed for the treatment of gout.

## Conditions treated

- [Gout](https://ourhealthnetwork.com/conditions/gout)

## Mechanism of action

Allopurinol tablets are a structural analogue of the natural purine base, hypoxanthine. Allopurinol acts on purine catabolism, without disrupting the biosynthesis of purines.

## Drug classification

- Established Pharmacologic Class: Xanthine Oxidase Inhibitor (Gout)
- Mechanism of Action class: Xanthine Oxidase Inhibitors [MoA]
- Route of administration: ORAL

## Common side effects

skin rash, nausea, diarrhea, drowsiness, elevated liver enzymes

## Sources and disclaimers

- FDA Orange Book and OpenFDA dataset
- This information is for educational purposes only and does not constitute medical advice. Always consult a healthcare professional before starting, stopping, or changing any medication.

## Related

- [All drugs](https://ourhealthnetwork.com/drugs)
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- [Methodology](https://ourhealthnetwork.com/methodology)