TY - JOUR T1 - Warfarin in the Emergency Service: Drug Interactions and Clinical Considerations TT - Acil Serviste Warfarin: İlaç Etkileşimleri ve Klinik Önlemler AU - Uskur, Tugce AU - Güven, Oya AU - Demireller, Merve PY - 2024 DA - July Y2 - 2024 DO - 10.18663/tjcl.1470923 JF - Turkish Journal of Clinics and Laboratory JO - TJCL PB - DNT Ortadoğu Yayıncılık A.Ş. WT - DergiPark SN - 2149-8296 SP - 234 EP - 239 VL - 15 IS - 2 LA - en AB - Aim: Drug-drug interactions (DDIs) are common occurrences where one drug influences the blood concentrations or efficacy of another. Warfarin, known for its narrow therapeutic index, carries a heightened risk of severe drug interactions. Material and Methods: We retrospectively analyzed the records of 211 patients using warfarin at the Emergency Health Services clinic of Kırklareli Training and Research Hospital from January 1, 2020, to December 31, 2020. Patient demographics and drug regimens were documented, and drug interaction assessments were conducted using the drugs.com database.Results: Among the 211 patients, 17 exhibited signs of bleeding, including 5 with major bleeding and 12 with minor bleeding. Of these, 129 had INR values exceeding 2.5, while 82 had INR values below 2.5. Notably, 11 of the 17 bleeding patients had INR values above 2.5, with an average INR of 3.69. Analysis revealed that the 211 patients collectively used 111 different drugs, with an average of 3.81 drugs per prescription. Intriguingly, 33 of these drugs exhibited major, moderate, or minor inter-actions and were prescribed to 174 patients.Conclusion: In conclusion, cautious and selective prescription of medications is warranted for patients receiving warfarin due to the potential for significant drug interactions. KW - warfarin KW - drug-drug interaction KW - emergency medicine N2 - Amaç: İlaç-ilaç etkileşimleri (İİE'ler), bir ilacın diğerinin kan konsantrasyonlarını veya etkinliğini etkilediği yaygın durumlardır. Dar terapötik indeksi ile bilinen warfarin, ciddi ilaç etkileşimleri açısından yüksek risk taşır. Gereç ve Yöntem: 1 Ocak 2020 ile 31 Aralık 2020 tarihleri arasında Kırklareli Eğitim ve Araştırma Hastanesi Acil Sağlık Hizmetleri kliniğinde warfarin kullanan 211 hastanın kayıtları retrospektif olarak analiz edildi. Hasta demografileri ve ilaç rejimleri belgelendi ve ilaç etkileşim değerlendirmeleri drugs.com veritabanı kullanılarak yapıldı.Bulgular: 211 hastadan 17'sinde kanama belirtileri görüldü; bunlardan 5'i büyük, 12'si küçük kanamalardı. 129 hastanın INR değerleri 2,5'in üzerindeyken, 82 hastanın INR değerleri 2,5'in altındaydı. Kanama yaşayan 17 hastadan 11'inin INR değeri 2,5'in üzerindeydi ve ortalama INR değeri 3,69'du. Analiz sonucunda, 211 hastanın toplamda 111 farklı ilaç kullandığı ve reçete başına ortalama 3,81 ilaç bulunduğu tespit edildi. İlginç bir şekilde, bu ilaçların 33'ü majör, orta veya minör etkileşimler gösterdiği ve 174 hastaya reçete edildiği görüldü.Sonuç: Sonuç olarak, warfarin kullanan hastalar için ilaç etkileşimleri potansiyeli nedeniyle ilaç reçetelendirmesi dikkatli ve seçici bir şekilde yapılmalıdır. CR - Becker M, Kallewaard M, Caspers PWJ, Visser LE, Leuens HGM and Stricker BH Ch, Hospitalisations and emergency department visits due to drug-drug interactions: a literature review, Pharmacoepidemiol. Drug Saf. 2007; 16(6) :641–51. CR - Bénard‐Laribière A, Miremont‐Salamé G, Pérault‐Pochat M‐C, Noize P, Haramburu F. The EMIR study group on behalf of the French network of pharmacovigilance centres. Incidence of hospital admissions due to adverse drug reactions in France: the EMIR study. Fundam Clin Pharmacol. 2015;29(1):106‐11. CR - Budnitz DS, Shehab N, Kegler SR, Richards CL. Medication use leading to emergency department visits for adverse drug events in older adults. Ann Intern Med. 2007;147(11):755–65. CR - Campbell CJ, Sefton M. Discharge teaching about warfarin: patient retention of knowledge. Have home care patients been taught what they need to know. Home Healthcare Nurse. 2010;28(6):366-74. CR - Carpenter M, Berry H, Pelletier AL. Clinically Relevant Drug-Drug Interactions in Primary Care. Am Fam Physician. 2019;99(9):558-64. CR - Dechanont S, Maphanta S, Butthum B, Kongkaew C. Hospital admissions/visits associated with drug–drug interactions: a systematic review and meta‐analysis. Pharmacoepidemiol Drug Saf. 2014;23(5):489‐97. CR - Eschenbacher L. PT, INR, and APTT testing. Washington State Department Of Health Elaborations News And İssues For Washington’s Clinical Laboratories. 2018;23(2):1-5. CR - Fihn SD, Callahan CM, Martin DC, McDonell MB, Henikoff JG, White RH. The risk for and severity of bleeding complications in elderly patients treated with warfarin. The National Consortium of Anticoagulation Clinics. Ann Intern Med. 1996;124(11):970-9. CR - Gallus AS, Baker RI, Chong BH, Ockelford PA, Street AM. Consensus guidelines for warfarin therapy. Recommendations from the Australasian Society of Thrombosis and Haemostasis. Med J Aust. 2000;172(12):600-5. CR - Guidelines for warfarin management in the community, January. 2016 CR - Hall AM, Wilkins MR. Warfarin: a case history in pharmacogenetics, Heart 2005;91(5):563-564. CR - Henry M, Kay MM, Viccellio P. Cardiogenic shock associated with calcium-channel and beta blockers: reversal with intravenous calcium chloride. Am J Emerg Med. 1985;3(4):334-6. CR - Kaplan NM. Amlodipine in the treatment of hypertension. Postgrad Med J. 1991;67 Suppl 5:s15-9. CR - Karabağ E. Concurrent Use of NSAIDs in Patients Taking Metoprolol and Drug Interaction. [Master’s dissertation]. Istanbul Medipol University. Istanbul. 2019. CR - Moran SM, Fitzgerald N, Pope M, Madden M, Vaughan CJ. Warfarin anticoagulation: a survey of patients’ knowledge of their treatment. Ireland Journal Medicine Science. 2011; (180):819-22. CR - Nikolic B, Jankovic S, Stojanov O, Popovic J. Prevalence and predictors of potential drug-drug interactions. Cent Eur J Med. 2014;9(2):348-56. CR - Palareti G, Leali N, Coccheri S, Poggi M, Manotti C, D'Angelo A, Pengo V, Erba N, Moia M, Ciavarella N, Devoto G, Berrettini M, Musolesi S. Bleeding complications of oral anticoagulant treatment: an inception-cohort, prospective collaborative study (ISCOAT). Italian Study on Complications of Oral Anticoagulant Therapy. Lancet. 1996;348(9025):423-8. CR - Pirmohamed M, James S, Meakin S, Green C, Scott AK, Walley TJ, et al. Adverse drug reactions as cause of admission to hospital: Prospective analysis of 18 820 patients. BMJ. 2004;329(7456):15–9. CR - Polat O, Kabaçam G, Güler İ, Ergişi K, Yıldız A. Surveillance analysis of patients presenting to the Ibn-i Sina Hospital Emergency Department. Turk J Emerg Med. 2005;5(2):78-81. CR - Routledge PA, O'Mahony MS, Woodhouse KW. Adverse drug reactions in elderly patients. Br J Clin Pharmacol. 2004;57(2):121–6. CR - Shehab N, Lovegrove MC, Geller AI, Rose KO, Weidle NJ, Budnitz DS. US Emergency Department visits for outpatient adverse drug events, 2013-2014. JAMA. 2016;316(20):2115–25. CR - Wallvik J. Sjalander A. Johansson L. Bjuhr O. Jansson JH. Bleeding complications during warfarin treatment in primary healthcare centres compared with anticoagulation clinics. Scand J Prim Health Care. 2007; 25(2): 123-28. UR - https://doi.org/10.18663/tjcl.1470923 L1 - https://dergipark.org.tr/en/download/article-file/3873739 ER -