What effect do Tegretol (carbamazepine) have on sleep?

What effect do Tegretol (carbamazepine) have on sleep?

• A. SWS increases
• B. REM increases
• C. REM latency decreases
• D. Wakefulness increases

Answer: (A)

Carbamazepine shifts sleep architecture toward more non-REM deep sleep and reduces REM sleep. Its CNS depressant effects dampen REM-generating activity, so the body spends more time in slow-wave sleep (the deepest non-REM stage). That’s why an increase in slow-wave sleep best fits the drug’s typical effect. REM increases or shorter REM latency would contradict the usual REM suppression seen with this medication, and waking more during the night isn’t the characteristic pattern you’d expect from carbamazepine’s sedating influence.

Carbamazepine shifts sleep architecture toward more non-REM deep sleep and reduces REM sleep. Its CNS depressant effects dampen REM-generating activity, so the body spends more time in slow-wave sleep (the deepest non-REM stage). That’s why an increase in slow-wave sleep best fits the drug’s typical effect. REM increases or shorter REM latency would contradict the usual REM suppression seen with this medication, and waking more during the night isn’t the characteristic pattern you’d expect from carbamazepine’s sedating influence.