Document Detail


Ondansetron is as effective as diphenhydramine for treatment of morphine-induced pruritus after cesarean delivery.
MedLine Citation:
PMID:  20236094     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Subarachnoid (SA) morphine, highly effective for the management of pain after a cesarean delivery, is associated with a significant incidence of pruritus in up to 80% of patients. No previous study has compared the effectiveness of ondansetron (5-HT(3) antagonist) vs. diphenhydramine (H(1) receptor blocker) for the treatment of this side effect. METHODS: In this randomized, double-blind study, 113 patients with a pruritus score 3 or 4 (1=absent; 2=mild, no treatment required; 3=moderate pruritus, treatment required; and 4=severe pruritus) after SA morphine 0.2 mg were assigned to group ondansetron, which received 4 mg intravenously (i.v.) ondansetron, and group diphenhydramine, which received 25 mg i.v. diphenhydramine. Patients who continued to have pruritus > or =3, 30 min after the study drug were considered treatment failures and were treated with naloxone 0.04 mg i.v. repeatedly, as well as patients who relapsed. Pain scores, nausea, vomiting, and sedation were determined before and 30 min after the study drugs were administered. Patients were followed up for 24 h. RESULTS: The success rate was comparable between the two groups [40/57 (70%) and 38/56 (70%), P=0.79, in group ondansetron and group diphenhydramine, respectively]. Among the successfully treated patients, the recurrence rates of moderate to severe pruritus were 11/40 (28%) in group ondansetron and 13/38 (35%) in group diphenhydramine, P=0.52. The side effect profile was similar between the two groups. CONCLUSION: Ondansetron is as effective as diphenhydramine in relieving pruritus caused by SA morphine in patients undergoing a cesarean delivery. However, up to 50% of patients required naloxone either for primary failure or for recurrence.
Authors:
S M Siddik-Sayyid; V G Yazbeck-Karam; B W Zahreddine; A M B F Adham; C M Dagher; W A Saasouh; M T Aouad
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Publication Detail:
Type:  Comparative Study; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't     Date:  2010-03-15
Journal Detail:
Title:  Acta anaesthesiologica Scandinavica     Volume:  54     ISSN:  1399-6576     ISO Abbreviation:  Acta Anaesthesiol Scand     Publication Date:  2010 Jul 
Date Detail:
Created Date:  2010-07-12     Completed Date:  2010-10-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0370270     Medline TA:  Acta Anaesthesiol Scand     Country:  England    
Other Details:
Languages:  eng     Pagination:  764-9     Citation Subset:  IM    
Affiliation:
Department of Anesthesiology, American University of Beirut-Medical Center, Beirut, Lebanon.
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MeSH Terms
Descriptor/Qualifier:
Adult
Cesarean Section*
Diphenhydramine / therapeutic use*
Double-Blind Method
Female
Histamine H1 Antagonists / therapeutic use*
Humans
Morphine / adverse effects*,  therapeutic use
Naloxone / therapeutic use
Narcotic Antagonists / therapeutic use
Narcotics / adverse effects*,  therapeutic use
Ondansetron / therapeutic use*
Pain, Postoperative / drug therapy*
Patient Satisfaction
Postoperative Nausea and Vomiting / epidemiology
Pregnancy
Pruritus / chemically induced,  drug therapy*
Recurrence
Serotonin Antagonists / therapeutic use*
Severity of Illness Index
Chemical
Reg. No./Substance:
0/Histamine H1 Antagonists; 0/Narcotic Antagonists; 0/Narcotics; 0/Serotonin Antagonists; 465-65-6/Naloxone; 57-27-2/Morphine; 58-73-1/Diphenhydramine; 99614-02-5/Ondansetron

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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