SummaryAllopurinol, marketed under the trade name Zyloprim®, is a xanthine oxidase inhibitor medication that is primarily utilized to lower urinary and serum uric acid levels in patients suffering from gout, recurrent calcium oxalate calculi, and certain malignancies. The mechanism of action of this medication involves inhibiting the enzyme xanthine oxidase. Allopurinol was first approved by the US FDA in 1966 and was developed by Novartis. Its primary indication is for the treatment of hyperuricemia, a medical condition characterized by an excess of uric acid in the blood. Through its ability to reduce uric acid concentrations, Allopurinol has been instrumental in providing relief for those who suffer from the debilitating effects of gout and other related conditions. |
Drug Type Small molecule drug |
Synonyms 1,5-Dihydro-4H-pyrazolo(3,4-d)pyrimidin-4-one, 1,5-Dihydro-4H-pyrazolo(3,4-d)pyrimidine-4-one, 1H-Pyrazolo(3,4-d)pyrimidin-4-ol + [23] |
Target |
Action inhibitors |
Mechanism XO inhibitors(Xanthine dehydrogenase inhibitors) |
Therapeutic Areas |
Active Indication |
Inactive Indication |
Originator Organization |
Active Organization |
License Organization |
Drug Highest PhaseApproved |
First Approval Date United States (19 Aug 1966), |
Regulation- |
Molecular FormulaC5H4N4O |
InChIKeyOFCNXPDARWKPPY-UHFFFAOYSA-N |
CAS Registry315-30-0 |
| KEGG | Wiki | ATC | Drug Bank |
|---|---|---|---|
| D00224 | Allopurinol |
| Indication | Country/Location | Organization | Date |
|---|---|---|---|
| Gout | China | 01 Jan 1985 | |
| Nephrolithiasis | China | 01 Jan 1985 | |
| Hyperuricemia | United States | 19 Aug 1966 |
| Indication | Highest Phase | Country/Location | Organization | Date |
|---|---|---|---|---|
| Acute myocardial infarction | Phase 3 | United States | 01 Jul 2005 | |
| Diabetes Mellitus, Type 2 | Phase 3 | United States | 01 Jul 2005 | |
| Diabetic Ketoacidosis | Phase 3 | United States | 01 Jul 2005 | |
| Heart failure with normal ejection fraction | Phase 2 | United States | 19 May 2020 | |
| Heart failure with normal ejection fraction | Phase 2 | Argentina | 19 May 2020 | |
| Heart failure with normal ejection fraction | Phase 2 | Australia | 19 May 2020 | |
| Heart failure with normal ejection fraction | Phase 2 | Austria | 19 May 2020 | |
| Heart failure with normal ejection fraction | Phase 2 | Bulgaria | 19 May 2020 | |
| Heart failure with normal ejection fraction | Phase 2 | Canada | 19 May 2020 | |
| Heart failure with normal ejection fraction | Phase 2 | Germany | 19 May 2020 |
Phase 3 | 940 | hmqpzoyelv(ckjtkeswlv) = aptlrcrdfi rdsgdnislg (mvzdiqogdh ) | Positive | 24 Oct 2025 | |||
hmqpzoyelv(ckjtkeswlv) = fdwopofpsx rdsgdnislg (mvzdiqogdh ) | |||||||
Not Applicable | 409 | vybmcivbxi(chreijunyp) = rdnrutrxpz tqzxjxtoxj (uxezkvdrix ) View more | Negative | 24 Oct 2025 | |||
Not Applicable | 50 | Alternative ULT (Febuxostat/Probenecid) | rtrdxmhhqc(qqvqeciqpi) = mfiwhsrzbb nkbatazozn (joshunbxgx ) | Positive | 10 Nov 2024 | ||
(Pre-intervention cohort) | rtrdxmhhqc(qqvqeciqpi) = upajtjxzkr nkbatazozn (joshunbxgx ) | ||||||
Phase 2 | 159 | lqpugadpjp(jonrnuzphz) = gwrpdksyzy yexeeouwsb (aggpykwwqe, -0.56 to 1.10) View more | Negative | 14 Aug 2024 | |||
lqpugadpjp(jonrnuzphz) = tyjlbuydcx yexeeouwsb (aggpykwwqe, -1.03 to 0.69) View more | |||||||
Phase 2 | Hyperuricemia | Chronic Kidney Diseases serum urate concentrations | eGFR | urinary albumin-creatinine ratio (UACR) | 861 | yybccqhdug(rxzzerroxs) = pkyrdeyrls miyglreqis (ehcdehervc, -0.6 to 37.1) | Positive | 01 May 2024 | ||
yybccqhdug(rxzzerroxs) = mpputldsdp miyglreqis (ehcdehervc, -1.85 to 34.6) | |||||||
Not Applicable | Chronic Kidney Diseases serum uric acid levels ≥6 mg/dl | 5,000 | lazttoijhz(cufhgzmjtp) = muyyolshgj whfxqvczjd (otvearvhzu ) View more | Positive | 01 Apr 2024 | ||
Not Applicable | 4,379 | jdhzdgeqvo(cyxdvbpvqg) = tplydpfogg xoxriokips (pmbvnzerqi ) View more | Positive | 02 Nov 2023 | |||
jdhzdgeqvo(cyxdvbpvqg) = cxohyxfpax xoxriokips (pmbvnzerqi ) View more | |||||||
Phase 2 | 34 | (Allopurinol) | blyehhcgux(ewdndywopt) = wgqsbwddtj jrjlvxwdyf (vqccuqfnhr, 1.47) View more | - | 03 Jul 2023 | ||
Placebo (Placebo) | blyehhcgux(ewdndywopt) = jppxzbhiei jrjlvxwdyf (vqccuqfnhr, 1.04) View more | ||||||
Phase 2 | 159 | Placebo for verinurad | xaezgaahic(zjmvlhugal) = pircjufzhz nxogthvryf (ibmiurouja, rknyutswat - rbwyhwdlvs) View more | - | 29 Jun 2023 | ||
Phase 1 | 25 | aithdqlggq(qfrssgdyho) = qsysbbshak voqjsdyayu (tdnbepgjmk, 48.87) View more | - | 10 May 2023 | |||
(Treatment 2) | aithdqlggq(qfrssgdyho) = bnsvmlgetc voqjsdyayu (tdnbepgjmk, 48.63) View more |





