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Abstract #60789 Published in IGR 16-4
Association between Ophthalmic Timolol and Hospitalisation for Bradycardia
Pratt NL; Ramsay EN; Kalisch Ellett LM; Nguyen TA; Roughead EEJournal of Ophthalmology 2015; 2015: 567387
INTRODUCTION: Ophthalmic timolol, a topical nonselective beta-blocker, has the potential to be absorbed systemically which may cause adverse cardiovascular effects. This study was conducted to determine whether initiation of ophthalmic timolol was associated with an increased risk of hospitalisation for bradycardia. MATERIALS AND METHODS: A self-controlled case-series study was undertaken in patients who were hospitalised for bradycardia and were exposed to timolol. Person-time after timolol initiation was partitioned into risk periods: 1-30 days, 31-180 days, and >180 days. A 30-day risk period prior to initiating timolol was also included. All remaining time was considered unexposed. RESULTS: There were 6,373 patients with at least one hospitalisation for bradycardia during the study period; 267 were exposed to timolol. Risk of bradycardia was significantly increased in the 31-180 days after timolol initiation (incidence rate ratio (IRR) = 1.93; 95% confidence interval (CI) 1.00-1.87). No increased risk was observed in the first 30 days or beyond 180 days of continuous exposure (IRR = 1.40; 95% CI 0.87-2.26 and IRR = 1.21; 95% CI 0.64-2.31, resp.). CONCLUSION: Bradycardia is a potential adverse event following timolol initiation. Practitioners should consider patient history before choosing a glaucoma regime and closely monitor patients after treatment initiation with topical nonselective beta-blocker eye drops.
Quality Use of Medicines and Pharmacy Research Centre, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, SA 5001, Australia.
Full articleClassification:
11.3.4 Betablocker (Part of: 11 Medical treatment > 11.3 Adrenergic drugs)
9.4.15 Glaucoma in relation to systemic disease (Part of: 9 Clinical forms of glaucomas > 9.4 Glaucomas associated with other ocular and systemic disorders)
