what is "normal"? since each person on this planet is uniquely different their response to medication is just as unique. some people do have to take a daily antihistamine to feel normal if their allergies are high. if you do not want to be on antihistamines you will need to see your medical provider or an allergist to be tested and then try an alternative approach.
i take zyrtec every day. if i skip a day i feel terrible headache. is this normal?