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Physicochemical stability of ternary admixtures of butorphanol, ketamine, and droperidol in polyolefin bags for patient-controlled analgesia use

Authors Fang BX, Wang LH, Gu JF, Chen FC, Shi XY

Received 28 September 2016

Accepted for publication 2 November 2016

Published 24 November 2016 Volume 2016:10 Pages 3873—3878


Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 2

Editor who approved publication: Dr Qiongyu Guo

Baoxia Fang,1 Linhai Wang,2 Junfeng Gu,3 Fuchao Chen,1 Xiao-ya Shi1

1Department of Pharmacy, Dongfeng Hospital, 2Department of Pharmacy, 3Department of Anesthesiology, Renmin Hospital, Hubei University of Medicine, Hubei, People’s Republic of China

Background: Delivery of drug admixtures by intravenous patient-controlled analgesia is a common practice for the management of postoperative pain; however, analytical confirmation of the compatibility and stability of butorphanol tartrate, ketamine hydrochloride, and droperidol combined in ternary admixtures is not available.
Methods: Butorphanol tartrate, ketamine hydrochloride, and droperidol have been examined for compatibility and stability when combined with 0.9% sodium chloride injection stored at 4°C and 25°C with light protection for a total of 14 days. Concentrations were 0.067 mg/mL, 1.33 mg/mL, and 0.033 mg/mL for butorphanol tartrate, ketamine hydrochloride, and droperidol, respectively. Drug concentrations were determined using high-performance liquid chromatographic analysis.
Results: All three drugs were very stable (>97%) at 4°C and 25°C for 14 days. The ternary admixtures were initially clear and colorless throughout the observation period, and the pH value did not change significantly.
Conclusion: The results confirm that the ternary admixture of butorphanol tartrate 0.067 mg/mL, ketamine hydrochloride 1.33 mg/mL, and droperidol 0.033 mg/mL in 0.9% sodium chloride injection were stable for 14 days when stored in polyolefin bags at 4°C and 25°C and protected from light.

Keywords: analgesia, patient-controlled analgesia, drug stability, butorphanol, ketamine, droperidol, HPLC

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