Which symptom is associated with the use of Pazeo?

Pazeo is an antihistamine eye drop that is primarily used to treat allergic conjunctivitis, which often presents symptoms such as itching and redness in the eyes. It specifically relieves itchy eyes by blocking the action of histamine, a compound involved in allergic reactions. This mechanism is why the symptom associated with the use of Pazeo is itching, making it effective for providing relief from the discomfort caused by allergens.

While other symptoms like pain, redness, and heavy tearing can occur due to different eye conditions or allergies, they are not the primary focus of Pazeo's effects. Pain in the eye usually indicates irritation or injury, redness can result from various factors including allergies, and heavy tearing may occur as a response to many irritants or conditions. However, Pazeo is specifically formulated to alleviate itching, making it the most relevant symptom for this medication.