Ramelteon and melatonin tend to have what level of effect on REM and slow-wave sleep?

• A. They cause strong REM suppression
• B. They increase REM sleep significantly
• C. They have no effect on REM
• D. They have less effect on REM and slow-wave sleep

Answer: (D)

Ramelteon and melatonin act mainly to promote sleep onset by signaling the body's circadian rhythm through melatonin receptors. Their effects focus on helping you fall asleep and keep sleep, rather than reshaping the sleep stages themselves. REM sleep and slow-wave sleep are the deeper, more restorative stages, and many other sedatives markedly alter these stages (for example, by suppressing REM or reducing slow-wave sleep). In contrast, ramelteon and melatonin have only minimal influence on REM and slow-wave sleep, making the option describing a smaller effect on these stages the most accurate. They can still improve overall sleep efficiency by helping you fall asleep faster, but they don’t cause strong REM suppression or major changes in slow-wave sleep.