<unk> (ophthalmic) is a ophthalmologic agent that is FDA approved for the treatment of allergic conjunctivitis.   Common adverse reactions include asthma, conjunctivitis, dyspnea, eye pain, fatigue, influenza-like symptoms, pharyngitis, pruritus, rhinitis, burning, stinging, and headache.
Azelastine 
Seratrodast
Pemirolast
Epinastine hydrochloride
Clemastine
Bepotastine Besilate
Montelukast
Acrivastine