What alcohol does while you sleep
When you are sleeping with alcohol in your system, it can cause:
Vivid dreams and nightmares: With alcohol in your system, you’re more likely to have intense, colorful dreams and nightmares. There’s also a chance you’ll act out your dreams in your sleep or even sleepwalk.
“There are parasomnias where you have more sleepwalking or nightmares – even sleep terrors,” Dr. Vensel-Rundo says. “Dream enactments can happen with alcohol, as well as with antidepressants.”
Breathing problems: Alcohol’s sedative effect extends to the rest of your body, as well.
“One of the concerns with alcohol, specifically, is that it tends to relax the muscles. It allows your airway to close more easily,” she says. “So, it increases the risk of sleep apnea or worsens it if you drink within the last couple of hours before bedtime.”
Opiates – narcotics used to treat pain – present even greater dangers. They can trigger central sleep apnea, a condition where your brain fails to signal your lungs to breathe.