<unk> (ophthalmic) is a antihistamine and H1 receptor antagonist that is FDA approved for the treatment of ocular itching associated with allergic conjunctivitis.   Common adverse reactions include blurred vision, burning sensation in eye and dry eye.
Olopatadine 
Dolastetron 
Loratadine
Rupatadine
Avacopan
Lerisetron
Palonosetron
Tropisetron