{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,16]],"date-time":"2026-07-16T17:50:06Z","timestamp":1784224206540,"version":"3.55.0"},"reference-count":20,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2012,1,16]],"date-time":"2012-01-16T00:00:00Z","timestamp":1326672000000},"content-version":"vor","delay-in-days":2540,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["accpjournals.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Pharmacotherapy"],"published-print":{"date-parts":[[2005,2]]},"abstract":"<jats:p>A 58\u2010year\u2010old Caucasian man was receiving long\u2010term anticoagulation with warfarin for the prevention of ischemic stroke; his international normalized ratio (INR) had been stable. His INR increased when he began consistent, low\u2010dose beer consumption for its perceived cardiovascular protection. After he stopped drinking the alcohol, his anticoagulation control improved and returned to previous levels. Information on the effects of alcohol, particularly beer, is limited in nonalcoholic patients who receive warfarin therapy. This case reveals a potential for low\u2010dose beer consumption to elevate INR. We propose that the increased antithrombotic effect of warfarin involved protein\u2010binding interactions and decreased warfarin metabolism through the cytochrome P450 (CYP) enzyme system. Concurrent administration of aspirin and other drugs that are metabolized through or are inhibitors of the CYP system may have enhanced the interaction that occurred in this patient. Caution should be used whenever warfarin and alcohol in any amount are taken together, especially in patients receiving many drugs, and close monitoring of the INR is warranted.<\/jats:p>","DOI":"10.1592\/phco.25.2.303.56955","type":"journal-article","created":{"date-parts":[[2005,1,12]],"date-time":"2005-01-12T06:35:04Z","timestamp":1105511704000},"page":"303-307","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":31,"title":["Enhanced Antithrombotic Effect of Warfarin Associated with Low\u2010Dose Alcohol Consumption"],"prefix":"10.1002","volume":"25","author":[{"given":"Dawn E.","family":"Havrda","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tien","family":"Mai","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jennifer","family":"Chonlahan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2012,1,16]]},"reference":[{"key":"e_1_2_1_2_2","doi-asserted-by":"publisher","DOI":"10.1161\/01.CIR.0000063575.17904.4E"},{"key":"e_1_2_1_3_2","doi-asserted-by":"publisher","DOI":"10.1097\/00000441-197903000-00007"},{"key":"e_1_2_1_4_2","doi-asserted-by":"publisher","DOI":"10.1001\/archinte.1981.00340040054017"},{"key":"e_1_2_1_5_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.0954-6820.1986.tb02776.x"},{"key":"e_1_2_1_6_2","doi-asserted-by":"publisher","DOI":"10.1161\/01.CIR.0000018653.19696.01"},{"key":"e_1_2_1_7_2","doi-asserted-by":"publisher","DOI":"10.7326\/0003-4819-133-6-200009190-00008"},{"key":"e_1_2_1_8_2","doi-asserted-by":"publisher","DOI":"10.1136\/heart.83.4.394"},{"key":"e_1_2_1_9_2","first-page":"40","article-title":"Alcohol and medication interactions","volume":"23","author":"Weathermon R","year":"1999","journal-title":"Alcohol Res Health"},{"key":"e_1_2_1_10_2","doi-asserted-by":"publisher","DOI":"10.2165\/00003088-197803060-00002"},{"key":"e_1_2_1_11_2","unstructured":"HankinL.Beer alcohol and calories. 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