Atiprosine (AY-28228) is an orally effective selective α1-adrenergic receptor antagonist with a pA2 value of 8.11. Atiprosine exhibits antagonistic activity against α2-adrenergic receptors (α1-adrenergic receptor), 5-HT₂ receptors (5-HT₂ receptor), and H₁ receptors (H₁ receptor). The pA2 values for these receptors are 6.04, 6.87, and 7.32 respectively. Atiprosine has antihypertensive and hypotensive effects in rats, dogs, and monkeys. It can be used for research on cardiovascular and mental disorders.

Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months.
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.