When Melody stopped taking barbiturates, she suffered a period of nausea, insomnia, and sleep problems. This phenomenon is known as _____.

Barbiturates

A class of drugs used as sedatives and sleeping aids, which can be habit-forming and have been largely replaced by safer alternatives for most applications.

Insomnia

A sleep disorder that makes it difficult for someone to fall asleep, stay asleep, or causes them to wake up too early and not be able to get back to sleep.

Nausea

A sensation of discomfort and unease in the stomach, often preceding vomiting.