Which type of medication does NOT contain amphetamine?

Drugs used to treat insomnia are generally designed to promote sleep and do not contain amphetamine. These medications often belong to a different class of drugs, such as benzodiazepines or non-benzodiazepine sleep aids like zolpidem, which work by enhancing the effects of a neurotransmitter called gamma-Aminobutyric acid (GABA). The primary aim of these medications is to induce sleep and maintain sleep without the stimulating effects associated with amphetamines.

In contrast, other medication types listed, such as those used to treat attention-deficit disorder, often contain stimulants like amphetamines that help increase focus and reduce impulsivity. Similarly, many diet pills also include stimulants, which can suppress appetite and boost metabolism. Nasal decongestants, while they may not contain amphetamines specifically, often include ingredients like pseudoephedrine that can stimulate the central nervous system.

Therefore, the primary function and chemical composition of insomnia medications distinguish them from those that contain amphetamines, confirming that they do not contain this type of stimulant.