International Journal of Medical Sciences

Impact factor

18 December 2018

ISSN 1449-1907 News feeds of published articles

Manuscript login | Account

open access Global reach, higher impact

Journal of Genomics in PubMed Central. Submit manuscript now...


Journal of Cancer

International Journal of Biological Sciences

Journal of Genomics



Journal of Biomedicine

PubMed Central Indexed in Journal Impact Factor

Int J Med Sci 2013; 10(7):864-869. doi:10.7150/ijms.5892

Research Paper

A Survey of the FAERS Database Concerning the Adverse Event Profiles of α1-Adrenoreceptor Blockers for Lower Urinary Tract Symptoms

Koji Yoshimura1, Kaori Kadoyama2, Toshiyuki Sakaeda2✉, Yoshio Sugino1, Osamu Ogawa1, Yasushi Okuno3 ✉

1. Department of Urology, Kyoto University Graduate School of Medicine, Kyoto, Japan;
2. Center for Integrative Education in Pharmacy and Pharmaceutical Sciences, Kyoto University Graduate School of Pharmaceutical Sciences, Kyoto, Japan;
3. Department of Systems Biosciences for Drug Discovery, Kyoto University Graduate School of Pharmaceutical Sciences, Kyoto, Japan.


Purpose: Current guidelines recommend α1-adrenoreceptor blockers (A1Bs) for treating lower urinary tract symptoms suggestive of benign prostatic hyperplasia, but their adverse effects can be problematic. In this study, reports submitted to the US Food and Drug Administration Adverse Event Reporting System (FAERS) between 1997 and 2011 were reviewed to assess the safety profiles of A1Bs.

Methods: After deleting duplicated submissions and revising arbitrary drug names, reports involving A1Bs for male patients were analyzed. Data mining algorisms were used for the quantitative detection of signals, where a signal represents an association between a drug and an adverse event or a drug-associated adverse event, including the proportional reporting ratio, reporting odds ratio, information component given by a Bayesian confidence propagation neural network, and empirical Bayes geometric mean.

Results: The total number of reports used was 1,260,182. Signal scores suggested the associations of alfuzosin, doxazosin, tamsulosin, and terazosin with dizziness/vertigo, orthostatic hypotension, erectile dysfunction, ejaculation dysfunction (EjD), thirst/dry mouth, and constipation; however, reports on naftopidil, silodosin, and urapidil were not enough to compare with the other 4 A1Bs. Signal scores for EjD were higher for tamsulosin, and those for dizziness/vertigo were lower for doxazosin than for the other 3 drugs.

Conclusions: Tamsulosin-associated EjD, which was found in clinical studies, was reproduced in this analysis with markedly higher signal scores, and these results strongly suggest the necessity of well-organized clinical studies on A1B-associated adverse events.

Keywords: adverse events, FAERS, α1 blockers, pharmacoepidemiology.

This is an open access article distributed under the terms of the Creative Commons Attribution (CC BY-NC) License. See for full terms and conditions.
How to cite this article:
Yoshimura K, Kadoyama K, Sakaeda T, Sugino Y, Ogawa O, Okuno Y. A Survey of the FAERS Database Concerning the Adverse Event Profiles of α1-Adrenoreceptor Blockers for Lower Urinary Tract Symptoms. Int J Med Sci 2013; 10(7):864-869. doi:10.7150/ijms.5892. Available from