Molecular Formula | C21H27ClN2O2
|
Molar Mass | 374.9 |
Density | 1.1020 (rough estimate) |
Melting Point | 190°C |
Boling Point | 250 °C(Press: 0.1 Torr) |
Water Solubility | < 700 mg/mL |
Solubility | Chloroform (Slightly), DMSO (Sparingly), Ethanol (Slightly), Methanol (Slightly, |
Appearance | Oil to Gel |
Color | Colourless to Yellow Thick |
pKa | pKa 1.96± 0.05;7.40± 0.03(H2O,t =24.5±0.5)(Approximate) |
Storage Condition | 2-8°C |
Refractive Index | 1.5400 (estimate) |
In vitro study | Hydroxyzine dihydrochloride inhibits carbachol (10 μM)-induced serotonin release by 34% at 10 μM, by 25% 1 μM and by 17% 0.1 μM in pretreated bladder slices for 60 min. |
In vivo study | Hydroxyzine dihydrochloride (12.5 mg/kg, 25 mg/kg and 50 mg/kg i.p.) shows little direct analgesic activity but markedly potentiates only the effect of morphine on the vocalization after-discharge which represents the affective component of pain in rats. Hydroxyzine dihydrochloride (50 mg/kg i.p.) potentiates morphine on the tail-flick test, while Hydroxyzine (12.5 mg/kg i.p.) decreases morphine antinociception in rats. |