The easiest way to take an antihistamine medicine is in tablet form. Tablets are the most convenient way to treat both perennial allergic rhinitis and seasonal allergic rhinitis ( Hayfever ). Tablets will treat runny nose, watery eyes, nasal congestion, sore throat etc.
The medicines in this section are the newer 2nd generation antihistamines and are generally classified as the "non-sedating antihistamines" or anti-drowsy.
They are essentially devoid of the sedative effects that the first generation antihistamine had, as they do not cross the blood/brain barrier and enter the brain in significant amounts, and are therefore very unlikely to cause drowsiness, ie anti-drowsy. They include cetirizine, loratadine, and fexofenadine.
The older antihistamine medicines are associated with troublesome sedative and antimuscarinic effects, and are often termed the "sedating antihistamines".
It should be noted that many of the effects of antihistamines vary as much with each patient as with each drug. We have not included "sedating antihistamines" on this site as they are not popular anymore, but if you do require them, please let us know.