Final answer:
Gloria is dependent on the psychoactive drug caffeine, which is a central nervous system stimulant found in coffee and energy drinks. Excessive consumption of caffeine can have negative effects.
Step-by-step explanation:
Gloria is dependent on a psychoactive drug called caffeine. Caffeine is a central nervous system stimulant that can be found in coffee and energy drinks. It stimulates the central nervous system, which is why Gloria feels that she needs it to function normally. However, excessive consumption of caffeine can lead to negative effects such as insomnia, agitation, and irregular heartbeat.