Everytime my friend has come over to watch a movie she has ended up falling asleep on my couch. This has happened about a dozen or so times and has me worried. It doesn't matter if it is 7 pm on a worknight or 7 pm on Saturday. As soon as we start watching a show she is out, usually within 20-30 minutes.
She even fell asleep at Catching Fire in the theater.
I don't know if it is meds or sleep apnea. Driving doesn't cause her to be sleepy. if it is apnea she needs to seek treatment. If it's meds maybe she could try something different.
Not really related, but my SIL once invited me over for New Years Eve to watch movies. She fell asleep at 8 and was still out when I left around 9:30.