催眠剂 meaning in English

hypnagogue
hypnotic agent
sleeaid
somnifacient
soporific

So , the pollen is mixed with a sleeping potion
原来花粉里混合了催眠剂
Or was it a sort of soporific he took , whilst something else worked on underneath in him
抑或那只是当他心底里有事时所用的催眠剂？
Scientists have known for some time that a steroid breakdown product of progesterone is a powerful sleep inducer that , in higher doses , can have analgesic , anticonvulsant and even anesthetic properties
黄体激素分解后的产物中，有一种类固醇，是强有力的催眠剂，剂量高一点，就可以当作止痛剂、抗惊厥剂，甚至麻醉剂，这是科学家知道好一阵子的事。