Hypnagogic Hallucina: In most cases, the cause is unknown, but it may occur more in people with sleep disorders such as narcolepsy, sleep paralysis, head injury, medication side-effects, or illicit substances.
Answered 12/9/2013
5.3k views
5 doctors weighed in across 2 answers
A doctor has provided 1 answer
2 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question