Is it safe to take zyrtec (cetirizine) most days of the year or is there a chance for long term problems with taking it too much? i try to avoid taking medicines.

Zyrtec (cetirizine) : Zyrtec is a safe anti-histamine with a relatively good tract record in long term users. But note that all medications have side effects. However, some are willing to take a small and smart risk for a better quality of life. Discuss nasal antihistamines & other non-systemic treatments with your doctor. With immunotherapy, an immunologist may be able to help avert your need for medications.