Allopurinol oral tablet is available as a generic drug and as brand-name drugs. Brand names: Zyloprim and Lopurin. Allopurinol is also given as an injection by a healthcare professional in the ...

More common side effects associated with allopurinol include diarrhea, nausea, and elevated liver enzymes. Allopurinol can be used short term or long term, depending on the condition it’s being used ...

The drug is approved for use in adults, and rarely, in some children. Allopurinol’s drug classification is a xanthine oxidase inhibitor. Allopurinol oral tablets are available in two strengths: 100 ...