Allopurinol

The brand product was first FDA-approved before 1982, and the first generic was approved Dec 10, 1985. FDA's Orange Book lists 32 AB-rated (therapeutically equivalent) products for this ingredient. In 2024, Medicare Part D spent $96 million on Allopurinol across 9.7 million claims for 2.4 million beneficiaries.

Allopurinol is available as 85 NDCs from 19 manufacturers (85 generic, 0 brand), with NADAC prices from $0.03 to $1.91 per EA — the most expensive product costs about 60× the cheapest. Every pack size and labeler in this drug market is compared side-by-side below.