| 中文名称 | 羟嗪 |
| 英文名称 | Hydroxyzine |
| CAS号 | 68-88-2 |
| 分子式 | C21H27ClN2O2 |
| 分子量 | 374.9 |
| EINECS号 | 200-693-1 |
| 熔点 | 190°C |
| 沸点 | 250 °C(Press: 0.1 Torr) |
| 密度 | 1.1020 (rough estimate) |
| 折射率 | 1.5400 (estimate) |
| 溶解度 | 可溶于氯仿(少量)、DMSO(少量)、乙醇(少量)、甲醇(少量) |
| 形态 | 油状至凝胶状 |
| 酸度系数(pKa) | pKa 1.96± 0.05;7.40± 0.03(H2O,t =24.5±0.5)(Approximate) |
| 颜色 | 无色至黄色 |
| 水溶解性 | < 700 mg/mL |
| 毒害物质数据 | 68-88-2(Hazardous Substances Data) |
| 毒性 | LD50 oral in rat: 840mg/kg |
|
H 1 Receptor
|
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.
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.