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| 標題: | Epinephrine as adjuvant for propranolol produces a marked peripheral action in intensifying and prolonging analgesia in response to local dorsal cutaneous noxious pinprick in rats |
| 作者: | Tzeng, Jann-Inn
Pan, He-Jia
Liu, Kuo-Sheng
Chen, Yu-Wen
Chen, Yu-Chung
Wang, Jhi-Joung |
| 貢獻者: | 食品科技系
藥學系 |
| 關鍵字: | Co-administration
Epinephrine HCl (Pub Chem CID: 5924)
(+/-)-Propranolol HCl (Pub Chem CID: 62882)
Bupivacaine HCl (Pub Chem CID: 49852290)
Subcutaneous injection
Cutaneous analgesia |
| 日期: | 2014-10 |
| 上傳時間: | 2015-05-06 21:20:53 (UTC+8) |
| 出版者: | Elsevier Science Bv |
| 摘要: | The aim of this study was to evaluate the effect of epinephrine as additive for propranolol as an infiltrative anesthetic. Using a rat model of cutaneous trunci muscle reflex (CTMR), we tested the effect of co-administration of epinephrine with propranolol on infiltrative cutaneous analgesia. Bupivacaine, a long-lasting local anesthetic, was used as control. Subcutaneous propranolol and bupivacaine elicited a dose-dependent local anesthetic effect on infiltrative cutaneous analgesia. On the 50% effective dose (ED50) basis, the relative potency was bupivacaine [2.05 (1.95-2.21) mu mol/kg] > propranolol [9.21 (9.08-9.42) mu mol/kg] (P < 0.01 for each comparison). Subcutaneous epinephrine (0.012 mu mol/kg) did not produce cutaneous analgesia. Mixtures of epinephrine (0.012 mu mol/kg) with drugs (propranolol or bupivacaine) at ED50 or ED95, respectively, intensified and prolonged drug action on infiltrative cutaneous analgesia. Intraperitoneal injection of combined drugs (propranolol or bupivacaine) at ED95 with epinephrine (0.012 mu mol/kg) exhibited no cutaneous analgesia. We concluded that propranolol was less potent but produced a similar duration of action when compared to bupivacaine on infiltrative cutaneous analgesia. Epinephrine as adjuvant for propranolol or bupivacaine enhanced the potency and extended the duration of action on infiltrative cutaneous analgesia. (C) 2014 Elsevier B.V. All rights reserved. |
| 關聯: | European Journal of Pharmacology, v.740, pp.565-569 |
| 顯示於類別: | [ 食品科技系 ] 期刊論文
[藥學系(所)] 期刊論文
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