Cayman Cirazoline (hydrochloride)

Cirazoline is an α₁-adrenergic receptor (α₁-AR) agonist (K_is = 120, 960, and 660 nM for recombinant α_1A-, α_1B-, and α_1D-ARs, respectively, in CHO cell membranes).¹ It acts as a full agonist at α_1A- and a partial agonist at α_1B- and α_1D-ARs in vitro (EC₅₀s = 70.7, 79.4, and 239.8 nM, respectively). It also acts as an antagonist at α₂-ARs with a PA₂ value of 7.56 to inhibit the norepinephrine-induced twitch response in isolated pig ileum.² Cirazoline (0.01-1 µg/kg) decreases blood pressure when administered via microinjection to the nucleus reticularis lateralis (NRL) of anesthetized normotensive cats.³ It enhances spatial memory and reduces depressive- and anxiety-like behavior in mice when administered at a concentration of 10 mg/L in drinking water for 2-9 months.⁴ It also enhances performance in the variable delayed response task in aged rhesus monkeys at high doses of 1-10 µg/kg but impairs performance at lower doses of 0.01-1 µg/kg.⁵

WARNING This product is not for human or veterinary use.