I believe Gideon takes a class of drugs for his parasomnia called SSRI's . They are considered antidepressants and are not habit forming. Typical sleeping "pills" are considered controlled substances and are addictive. It would really not be the correct form of drug therapy for his disorder. I think Gideon is probably more comfortable with the idea of taking something non habit forming as most people are. He does need to take the medication on a regular basis once he starts it and if he does discontinue it , it should be done gradually and not abruptly as that could actually trigger nightmares and other side effects. That being said ;with all that has been going on, I wonder if Gideon has been compliant with his meds and his appointments with Dr. Peterson. Even with Eva by his side, his best chance at alleviating the nightmares would be the drug therapy+psycho therapy+Eva...