stimulant (e.g. psychoactive drugs like methamphetamine, ritalin, etc.)
stimulant effect (e.g. caffeine)
Great Awakening (18th century American Christian revival movement)
hyperarousal (symptom of PTSD)
level of awakeness; level of arousal
hyperarousal (symptom of PTSD)
circadian rhythm sleep-wake disorder; CRSWD