It'll cure what ails you...
Some popular antihistamine allergy medications:
Over-the-counter: Benadryl, Claritin, Chlor-Trimeton, Dimetane and Tavist. Ocu-Hist is an OTC eye drop.
Prescription: Clarinex, Allegra, and Zyrtec. Astelin is a prescription nasal spray. Eye drops include Emadine and Livostin.
"You can't beat the quick fix that these medicines offer." - Gary Branch, Pharmacist
Antihistamines
Antihistamines have been used for years to treat allergy symptoms. They can be taken as pills, liquid, nasal spray or eye drops. Over-the-counter antihistamine eye drops can relieve red itchy eyes, while nasal sprays can be used to treat the symptoms of seasonal or year-round allergies.
How Do Antihistamines Work?
When you are exposed to an allergen -- like ragweed pollen -- it triggers your immune system to go into action. Immune system cells known as "mast cells" release a substance called histamine, which attaches to receptors in blood vessels causing them to enlarge. Histamine also binds to other receptors causing redness, swelling, itching and changes in secretions. By blocking histamine receptors, antihistamines prevent these symptoms.
Source: webmd.com