Key takeaways
Olopatadine (Pataday) and azelastine (Astepro Allergy) are both antihistamines used to treat allergy symptoms, but they are used differently. Olopatadine is an eye drop that helps relieve eye itching and redness caused by allergies. It is available over-the-counter and can be used in children as young as 2 years old. On the other hand, azelastine is a nasal spray that treats nasal symptoms like stuffy nose, sneezing, and runny nose. It is also available over-the-counter but is only approved for use in adults and children 6 years and older. Olopatadine should not be used with contact lenses and can cause blurry vision and dry eye. Azelastine might cause a bitter taste, nasal discomfort, and drowsiness. Additionally, azelastine can make you sleepy, so you should avoid alcohol and activities that require alertness.
