<unk>  is a sympatholytic antihypertensive drug. It acts as an α1-adrenoceptor antagonist and as an 5-HT1A receptor agonist Although an initial report suggested that<unk>  was also an α2-adrenoceptor agonist, this was not substantiated in later studies that demonstrated it was devoid of agonist actions in the dog saphenous vein and the guinea-pig ileum. Unlike some other α1-adrenoceptor antagonists,<unk>  does not elicit reflex tachycardia, and this may be related to its weak β1-adrenoceptor antagonist activity, as well as its effect on cardiac vagal drive.<unk>  is currently not approved by the U.S. Food and Drug Administration, but it is available in Europe.
Urapidil
Timolol 
Dinoprostone
Latanoprost
Iopydol
Carboprost
Pilocarpine 
Travoprost