Beta-blocker therapy and symptoms of depression, fatigue, and sexual dysfunction.
BACKGROUND
beta-Blocker therapy remains substantially underused in cardiac patients despite its proven mortality benefits. Reluctance to prescribe these agents may derive from concerns about their association with symptoms of depression, fatigue, and sexual dysfunction.


OBJECTIVE
To determine the association of beta-blockers with depressive symptoms, fatigue, and sexual dysfunction by performing a quantitative review of randomized trials that tested beta-blockers in myocardial infarction, heart failure, and hypertension.


METHODS
Randomized trials of beta-blockers used in the treatment of myocardial infarction, heart failure, or hypertension were identified by searching the MEDLINE database for English-language articles (1966-2001). In addition, we searched the reference lists of previously published trials and reviews of beta-blockers for additional studies.


METHODS
Criteria for inclusion of trials in the review were: random allocation of study treatments, placebo control, noncrossover design, enrollment of at least 100 patients, and a minimum of 6 months of follow-up. The initial search produced 475 articles, 42 of which met these criteria. Fifteen of these trials reported on depressive symptoms, fatigue, or sexual dysfunction and were selected for inclusion.


METHODS
For each trial, 1 author abstracted the frequency of adverse events in the beta-blocker and placebo groups and the numbers of patients randomized to the treatment groups. Two other authors verified the counts of events, and all authors adjudicated any discrepancies. Two different types of information on adverse events were abstracted: patient-reported symptoms and withdrawal of therapy due to a specified symptom. We categorized the tested beta-blockers by generation (early vs late) and lipid solubility (high vs low to moderate).


RESULTS
The 15 trials involved more than 35,000 subjects. beta-Blocker therapy was not associated with a significant absolute annual increase in risk of reported depressive symptoms (6 per 1000 patients; 95% confidence interval [CI], -7 to 19). beta-Blockers were associated with a small significant annual increase in risk of reported fatigue (18 per 1000 patients; 95% CI, 5-30), equivalent to 1 additional report of fatigue for every 57 patients treated per year with beta-blockers. beta-Blockers were also associated with a small, significant annual increase in risk of reported sexual dysfunction (5 per 1000 patients; 95% CI, 2-8), equivalent to one additional report for every 199 patients treated per year. None of the risks of adverse effects differed significantly by degree of beta-blocker lipid solubility. The risk associated with reported fatigue was significantly higher for early-generation than for late-generation beta-blockers (P =.04).


CONCLUSIONS
The conventional wisdom that beta-blocker therapy is associated with substantial risks of depressive symptoms, fatigue, and sexual dysfunction is not supported by data from clinical trials. There is no significant increased risk of depressive symptoms and only small increased risks of fatigue and sexual dysfunction. The risks of these adverse effects should be put in the context of the documented benefits of these medications.
Ko
Dennis T
DT
Section of Cardiovascular Medicine, Department of Medicine, Yale University School of Medicine, New Haven, CT 06520-8025, USA.
Hebert
Patricia R
PR
Coffey
Christopher S
CS
Sedrakyan
Artyom
A
Curtis
Jeptha P
JP
Krumholz
Harlan M
HM
D000319:Adrenergic beta-Antagonists / Q000009:adverse effects* / Q000627:therapeutic use; D002317:Cardiovascular Agents / Q000009:adverse effects* / Q000627:therapeutic use; D003863:Depression / Q000139:chemically induced*; D005221:Fatigue / Q000139:chemically induced*; D005260:Female; D006333:Heart Failure / Q000188:drug therapy; D006801:Humans; D006973:Hypertension / Q000188:drug therapy; D008297:Male; D009203:Myocardial Infarction / Q000188:drug therapy; D016032:Randomized Controlled Trials as Topic; D012306:Risk; D012735:Sexual Dysfunction, Physiological / Q000139:chemically induced*
D000319:Adrenergic beta-Antagonists; D002317:Cardiovascular Agents