Viloxazine, sleep, and subjective feelings

Area of Science:

• Pharmacology
• Sleep Medicine
• Neuroscience

Background:

• Viloxazine is a medication with antidepressant properties.
• Understanding its effects on sleep and mood is crucial for clinical application.

Purpose of the Study:

• To investigate the electrophysiological effects of viloxazine on human sleep.
• To assess the impact of viloxazine on subjective mood, concentration, and sleep quality.

Main Methods:

• Electrophysiological sleep recordings in 8 volunteers (mean age 55) taking 200 mg viloxazine daily for 3 weeks.
• Subjective ratings of feelings and sleep quality using visual analogue scales in 23 volunteers (mean ages 55 and 34) during viloxazine treatment and placebo periods.

Main Results:

• Viloxazine reduced total sleep duration, increased transitions to wakefulness/drowsiness, decreased slow-wave sleep, and increased stage 2 sleep.
• Rapid eye movement (REM) sleep was significantly reduced, with a rebound effect upon withdrawal. Subjective measures indicated impaired concentration, mood, and sleep quality.
• Weight loss correlated with gastrointestinal issues; some subjects experienced withdrawal symptoms like vomiting.

Conclusions:

• Viloxazine alters sleep architecture, characterized by reduced REM sleep and increased lighter sleep stages.
• The drug negatively impacts cognitive function and subjective sleep experience, though mood elevation occurred in some individuals.
• Viloxazine exhibits pharmacological properties similar to imipramine and amphetamines, warranting careful consideration in clinical practice.