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Werzer, Christina; Schäfer, Simon und Hofmann-Kiefer, Klaus (2022): Medikamenteninteraktion zwischen Ceftriaxon und Theodrenalin/Cafedrin. In: Anaesthesiologie, Bd. 72, Nr. 2: S. 109-112 [PDF, 1MB]

Abstract

Adverse interactions between intravenous medications which are given simultaneously are a common problem in intensive care medicine. They are usually caused by administering a high number of medications over a limited number of intravenous lines or central venous catheters;however, this issue also arises in routine anesthetic procedures during surgery. The following case report highlights a so far undocumented interaction between the combination of theodrenaline/cafedrine and various antibiotics. Laparoscopic cholecystectomy was performed in a female patient, classified as ASA 1. After induction of general anesthesia 2 g ceftriaxone were administered as a perioperative antibiotic prophylaxis. Simultaneously, i.e. prior to the beginning of surgery, a mild decrease in blood pressure was observed and 2 ml diluted Akrinor (R) (2 ml theodrenaline/cafedrine + 8 ml NaCl 0.9%) was administered. Directly following this administration a chemical precipitation reaction occurred, and large white pasty flakes were noticed in the intravenous line. The infusion was stopped immediately and all lines were replaced. In order to confirm a causal relationship between the observed precipitation and the simultaneous administration of the two drugs, an in vitro test was performed by mixing Akrinor (R) with other preparations of cephalosporin antibiotics. The effect observed with ceftriaxone was reproducible and cefazoline also caused a precipitation reaction.

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