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Olopatadine vs. Zyrtec

Olopatadine (Pataday) is an over-the-counter (OTC) allergy eye drop for adults and children 2 years and up. It works as an antihistamine to help relieve itchy and red eyes from allergies. There are 3 types of olopatadine eye drops (Pataday). There's a lower-strength version that's used twice a day. Regular-strength and extra-strength versions that are used once a day are also available. Some side effects include blurry vision and dry eye.

• Temporary relief of allergy eye symptoms, such as itchy and red eyes

• Blurry vision
• Burning or stinging in the eye
• Feeling like something is in the eye
• Common cold symptoms
• Sore throat

• For use in the eyes only
• Remove contact lenses before use

Cetirizine (Zyrtec) is an antihistamine. It's used for relief of allergy symptoms, such as runny nose or watery eyes, in adults and children. Cetirizine (Zyrtec) is also a safe option for people who are pregnant. This medication is available in different formulations, including tablets and liquid solutions. Typically, cetirizine (Zyrtec) is taken by mouth once per day. The most common side effect of cetirizine (Zyrtec) is sleepiness. But it's less likely to make you drowsy compared to some other antihistamines, such as diphenhydramine (Benadryl).

• Short-term relief of allergy symptoms (sneezing, runny nose, itchy or watery eyes, itching of the nose or throat)
• Relief of itchiness due to chronic (long-term) hives in children ages 6 months to under 6 years old - certain liquid solutions only

People 12 years of age and older:

• Sleepiness (14%)
• Tiredness (6%)
• Dry mouth (5%)

Children age 6 to under 12 years:

• Headache (11-14%)
• Sore throat (3-6%)
• Stomach pain (4-6%)
• Cough (3-4%)
• Sleepiness (2-4%)

• Sleepiness
• Accidentally taking too much medication