Why can't I dream?
Approved answer
Factors Affecting Dreaming
Certain substances, including caffeine, alcohol, benzodiazepines, and some psychiatric medications, can interfere with REM sleep, which in turn may reduce the frequency of vivid dreams. Additionally, sleep disorders such as narcolepsy, insomnia, and obstructive sleep apnea can lead to disruptions during sleep, resulting in more fragmented dreaming experiences.