But, if you're thinking these antihistamines are all the same, they actually are not.
Depending on the allergic condition being treated, the age of the person, as well as other underlying issues (such as pregnancy), the best choice of antihistamine might be different.
Yet, for severe symptoms which are interfering with work, school, or play, a medication such as Zyrtec may be needed.
In addition, it is very important to note that every person is different.
The best choice for any one person is based on the degree of symptom relief desired and the degree of side effects you are willing to tolerate.