what are the best medicines for allergic rhinitis? anyone who can suggest?

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I've been experiencing stuffy nose, clogged nose, itchy eyes,ears, nose and throat for so many years now, and up to now i'm suffering for this kind of allergies, and i want to overcome it, or maybe have the best medicine to cure it. i have allergies in animal dander especially, cats. that's why i hate those cats, it triggers, especially when i hold that animals, so anyone who can suggest a medicine for my allergies...