Purpose: To compare the safety of repeat intravitreal injections of bevacizumab versus ranibizumab performed on a large series of patients during the past 2 years period of time.
Methods: Four hundred fifty patients receiving 2,000 injections (1,275 bevacizumab and 725 ranibizumab) were studied retrospectively. Injections performed in a usual examination room under the standard sterile conditions. Follow-up varied from 3 to 24 months.
Results: Serious ocular adverse events were uncommon. Only one patient developed retinal detachment (0.05%). Most common procedure-related ocular adverse event was injection-site redness (64.75%). Postoperative subconjuctival hemorrhage occurred after 200 (10%) injections. Patients receiving aspirin treatment were more prone to have subconjuctival hemorrhage (P = 0.0002). Most common drug-related ocular adverse event was uveitis (1.90%), which was treated successfully and lasted no >12 days. There was no statistically significant difference between the patients treated with bevacizumab or ranibizumab regarding the noted adverse events (P > 0.5%).
Conclusion: Multiple intravitreal injections of bevacizumab or ranibizumab were both well tolerated and safe. Performing injections on a usual examination room proved safe. Injection-site redness, subconjuctival hemorrhage, and uveitis were the most common ocular adverse events. Aspirin treatment was a risk factor for the development of subconjuctival hemorrhage.