Which example is classified under non-barbiturates?

Benadryl is classified as a non-barbiturate because it is an antihistamine primarily used to relieve allergy symptoms, motion sickness, and to induce sleep. Its active ingredient is diphenhydramine, which does not belong to the barbiturate class of drugs.

Barbiturates are a specific category of drugs that act as central nervous system depressants and were historically used for anxiety and sleep disorders, but have largely fallen out of favor due to their potential for addiction and overdose. In contrast, medications such as Valium and Xanax fall into different categories — benzodiazepines — which are not considered barbiturates but have similar depressant effects. Prozac is an antidepressant and does not share similarities with barbiturates either.

Thus, Benadryl stands out as a non-barbiturate due to its different mechanism of action and primary use, distinguishing it from the other medications listed.