Which drug is classified as a sedative and is used to treat insomnia?

The drug that is classified as a sedative and is commonly used to treat insomnia is Restoril. Restoril is the brand name for temazepam, which is part of the benzodiazepine class. Benzodiazepines are known for their calming effects, which makes them effective in treating conditions like insomnia by helping patients fall asleep and stay asleep. Temazepam works by enhancing the effect of a neurotransmitter called gamma-aminobutyric acid (GABA) in the brain, leading to a sedative effect.

The other drugs listed do not belong to the sedative category or are not primarily indicated for the treatment of insomnia. Januvia is an antidiabetic medication used to manage blood sugar levels in type 2 diabetes. Calan is a calcium channel blocker used primarily for hypertension and certain heart conditions, and Vasotec is an ACE inhibitor used to treat high blood pressure and heart failure. Their mechanisms of action and therapeutic uses differ significantly from those of Restoril.