Azelastine is histamine 1 receptor antagonist. It’s side effects are drowsiness, and bitter taste in mouth. Less common are nosebleeds, headache, dizziness, blurred vision, eye pain, eye redness, rapid heart beat, and trouble breathing. I did not find cataract being caused by azelastine in literature. Periodic eye exam should be done as part of regular healthcare. Hope it helps.
Answered 6/19/2021
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