Abstract
To compare the heart rate increase side effect of different antimuscarinic drugs used in overactive bladder (OAB). Overall 341 patients were consecutively randomized to take seven different antimuscarinic drugs between January 2014 and June 2016at three institutions, and 250 patients who completed the follow-up visits were accepted into this study. Ninety-one patients who never came to visits were excluded. Drugs were classified into two groups as selective (darifenacin hydrobromide, solifenacin succinate and oxybutynin hydrochloride) and non-selective (fesoterodine fumarate, tolterodine tartrate, trospium chloride and propiverine hydrochloride) antimuscarinic drugs. The cardiac pulse rates and the blood pressures were recorded during the baseline, first visit (1week) and second visit (1month). Data were compared for drugs and two groups (selective versus non-selective) by using ANOVA test. Baseline characteristics were similar among the patients using different antimuscarinic drugs. Statistically significant increase in heart rate occurred in patients treated with non-selective antimuscarinic drugs compared to those treated with selective drugs (p < 0.001), and this increase was especially evident in patients treated with trospium chloride, tolterodine tartrate, fesoterodine fumarate and propiverine hydrochloride (p < 0.001, 0.003, 0.011 and 0.37, respectively). There was no statistical difference for the other side effects. Our results showed that heart rate significantly increased in OAB patients treated with non-selective antimuscarinic drugs. Trospium chloride, tolterodine tartrate, fesoterodine fumarate and propiverine hydrochloride seem to have the most unfavorable properties with regard to increased heart rate side effect when compared to the other antimuscarinic drugs (darifenacin hydrobromide, solifenacin succinate and oxybutynin hydrochloride).
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