<unk>  is a mast cell stabilizer, ophthalmologic agent that is FDA approved for the treatment of allergic conjunctivitis.   Common adverse reactions include headache, ocular burning, irritation and stinging, unpleasant taste, nasal congestion,  conjunctivitis, eye redness, photophobia, and rhinitis..
Nedocromil
Cromolyn 
Tocofersolan
Carbocromen
Plerixafor
Hymecromone
Dihydroergocryptine
Theobromine