Selective alpha 2 agoinst used in glaucoma -
Brimonidine (0.2% : 2 times/day). It is a selective alpha-2-adrenergic agonist and lowers IOP by decreasing aqueous production. Because of increased allergic reactions and tachyphylaxis rates it is not considered the drug of first choice in POAG. It is used as second drug of choice and also for combination therapy with other drugs Ref.AK Khurana 4th edition page no 223
Timolol
Epinephrine
Dipivefrine
Brimonidine
Glaucoma