Mood effects of diazepam and caffeine

Area of Science:

• Psychopharmacology
• Neuroscience

Background:

• Mood alterations are common after psychoactive substance administration.
• Understanding the differential effects of anxiolytics and stimulants on subjective mood states is crucial.

Purpose of the Study:

• To investigate the subjective mood changes induced by Diazepam and Caffeine.
• To compare the efficacy of a checklist versus magnitude estimation for mood assessment.

Main Methods:

• Participants' mood was assessed using a checklist and magnitude estimation of adjectives after Diazepam and Caffeine administration.
• Six mood dimensions were evaluated: pleasantness, activation, extraversion, calmness, social orientation, and control.

Main Results:

• Diazepam significantly decreased activation and extraversion, and increased calmness.
• Caffeine exhibited effects opposite to Diazepam on the magnitude estimation scale, though not on the checklist.
• Men reported higher pleasantness than women post-Diazepam administration.

Conclusions:

• Diazepam and Caffeine exert distinct subjective mood effects.
• The checklist demonstrated greater discriminative power for mood assessment than magnitude estimation in this study.