Which substances are considered stimulants in Schedule III?

Benzphetamine and chlorphentermine are classified as stimulants in Schedule III of the Controlled Substances Act. These substances are used primarily for their appetite-suppressant properties in the treatment of obesity. As stimulants, they affect the central nervous system, leading to increased alertness and a reduction in the feeling of hunger.

The significance of a substance being classified in Schedule III is that it has a legitimate medical use but also carries the potential for abuse and dependence, albeit less than Schedule I and II substances. The classification ensures that while patients can benefit from these medications under a healthcare provider's supervision, safeguards are in place to prevent misuse.

In comparison, alprazolam and diazepam are classified as benzodiazepines and are not considered stimulants; instead, they are central nervous system depressants. Codeine and morphine belong to Schedule II as opioids and do not fit into the stimulant category. Caffeine and theophylline, commonly recognized as stimulants, are generally classified as non-controlled substances in most contexts, making 'B' the only correct choice in the context of Schedule III stimulants specifically.