Key takeaways
Alocril (nedocromil) and azelastine are both used to treat allergy symptoms, but they work differently and are used in different ways. Alocril (nedocromil) is an eye drop that helps with itchy and watery eyes caused by allergies. It is a mast cell stabilizer, which means it stops cells in your eyes from releasing chemicals that cause allergic reactions. You need a prescription for Alocril, and it is not the first-choice treatment for eye allergies. Common side effects include headaches and eye irritation. On the other hand, azelastine is a nasal spray that treats nasal allergy symptoms like a runny or stuffy nose. It is an antihistamine, which blocks histamine to relieve symptoms. Azelastine is available in both prescription and over-the-counter forms, with the prescription version also treating non-allergy-related nasal symptoms. Side effects can include a bitter taste and sleepiness. While Alocril is specifically for eye symptoms, azelastine targets nasal symptoms and can be used more broadly.
