Which of the following drugs is classified as a sedative-hypnotic?

Explanation

Among the listed medications, Zolpidem is recognized as a sedative-hypnotic used primarily to treat insomnia. The other drugs serve different purposes: Zolmitriptan is for migraines, Zileuton is a leukotriene inhibitor for asthma, and Zalcitabine is an antiretroviral agent.