PT - JOURNAL ARTICLE AU - Jiawen Lv AU - Guannan Wu AU - Fang Zhang AU - Xin Su TI - An unusual case of piperacillin-tazobactam-induced fever, eosinophilia, thrombocytopenia and liver damage AID - 10.1136/ejhpharm-2020-002575 DP - 2022 Mar 01 TA - European Journal of Hospital Pharmacy PG - e91--e94 VI - 29 IP - e1 4099 - http://ejhp.bmj.com/content/29/e1/e91.short 4100 - http://ejhp.bmj.com/content/29/e1/e91.full SO - Eur J Hosp Pharm2022 Mar 01; 29 AB - Piperacillin-tazobactam is a broad-spectrum antimicrobial agent that is commonly used in clinical practice. The development of delayed drug hypersensitivity reaction (DHR) has been reported in several cases previously. Here we describe an unusual case of non-immediate DHR due to a prolonged course of piperacillin-tazobactam. We report a 22-year-old man who developed fever, eosinophilia, thrombocytopenia and elevated hepatic enzymes following 17 days of piperacillin-tazobactam for methicillin-sensitive Staphylococcus aureus (MSSA) pneumonia. These adverse reactions were reversed immediately after antibiotic cessation. Our case highlights that clinicians should be aware of delayed adverse effects in patients receiving long-term piperacillin-tazobactam treatment.All data relevant to the study are included in the article.