PMID: 8602055Apr 20, 1996Paper

Risk of gastrointestinal haemorrhage with calcium antagonists in hypertensive persons over 67 years old

Lancet
M PahorR J Havlik

Abstract

Calcium antagonists are used frequently in management of hypertension. In addition to their cardiovascular effects, these drugs inhibit platelet aggregation. Therefore we examined whether the use of calcium antagonists was associated with an increased risk of gastrointestinal haemorrhage (GIH). A prospective cohort study was conducted from 1985 through 1992 on 1636 hypertensive persons aged > or = 68 years living in three communities. The participants were taking beta-blockers, angiotensin-converting enzyme (ACE) inhibitors, or calcium antagonists; those taking combinations of these drugs were excluded. The incidence of GIH was assessed by surveying hospital discharge diagnoses and deaths. Age, gender, disability, arterial pressure, other drugs, and comorbid conditions were examined as confounders. Compared with beta-blockers (4819 person-years, 65 events), after adjustment for confounders the relative risk for GIH associated with ACE inhibitor (772 person-years, 13 events) was 1.23 (95% CI 0.66-2.28) and with calcium antagonists (1510 person-years, 42 events) it was 1.86 (1.22-2.82). The risks for verapamil, diltiazem, and nifedipine did not differ significantly. The results were unchanged when the analyses were restricted to ...Continue Reading

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