TY - JOUR
A1 - Gavali, Dhaval
A1 - Kulkarni, Kala
A1 - Kumar, Amal
A1 - Chakraborty, Bhaswat
T1 - Therapeutic class-specific signal detection of bradycardia associated with propranolol hydrochloride
Y1 - 2009/7/1
JF - Indian Journal of Pharmacology
JO - Indian J Pharmacol
SP - 162
EP - 166
VL - 41
IS - 4
UR - https://www.ijp-online.com/article.asp?issn=0253-7613;year=2009;volume=41;issue=4;spage=162;epage=166;aulast=Gavali;aid=Indian%20J%20Pharmacol_2009_41_4_162_56068
DO - 10.4103/0253-7613.56068
N2 - **Background:** Propranolol hydrochloride, one of the most widely used β-blocker in the treatment of hypertension since 1960s, shows a number of serious and non-serious adverse events.
**Objective:** Major objectives of this study were to extract the Canadian Adverse Drug Reaction Monitoring Program (CADRMP) database for possible toxic signal detection (SD) of propranolol hydrochloride, evaluate the frequency of the bradycardia associated with it in different stratified groups for a putative signal, and generate awareness in healthcare professionals regarding usefulness of SD.
**Materials and Methods:** Appropriate statistical methods were used for adverse drug reaction (ADR) signal detection such as, proportional reporting ratio (PRR); reporting odds ratio (ROR); the Chi-square (λ^{2} ) statistic method; the 95% confidence interval (CI); the observed to expected ratio (O/E); and Du Mouchel method were used to calculate the possible signals. Significance of λ^{2} and other calculated statistics, e.g., PRR and ROR, was based on a composite criterion of regulatory guidelines and not on any particular statistical level of significance.
**Results:** Calculated statistics by different methods were compared with the regulatory criteria of a statistic value ≥4.0 for λ^{2} ,^{ } and ≥3.0 for the rest for SD to be declared significant. The PRR statistic was found to be 2.5054; by the ROR method it was 2.5820; the λ^{2 } statistic was 3.2598, whereas the lower and upper limits of 95% CI of PRR were found to be 0.0778 and 1.9104, respectively, by the O/E ratio was found to be 2.3978, and PRR with the help of Du Mouchel was found to be 2.3979. Thus, the bradycardia-propranolol signals calculated in this study were not significant.
**Conclusions:** The therapeutic class specific signal of bradycardia associated with propranolol hydrochloride was not found potent enough to cause bradycardia. However, since the calculated statistics were very high albeit not significant, the possibility of bradycardia-propranolol pairing should still be analyzed from larger databases.
ER -