I have had hallucinations from Percodan, when I was 18 and got my wisdom teeth out, and more recently, with Melatonin. Thankfully, I was given information at the time, about the possibility of hallucinations with the Percodan. The medication did absolutely nothing for the pain, and I did not care one bit for the hallucinations, but at least I knew that they were hallucinations, rather than me going crazy or something like that. I didn’t expect them to occur with Melatonin, and it has not happened every time I have taken it. However, since it only makes me drowsy and sleep for a few hours, I’ve decided not to bother taking it any more. It also gives me extremely vivid dreams, which actually exhausts me even more. The hallucinations appear to me as things that I know, but the image, instead of appearing like a 3 dimensional object, or person, is outlined in colored lines kind of like neon lights. I have only experienced them at night, so I have seen the images on the ceiling, kind of floating around, almost in a watery way. I have seen everything from my Grandma, to the Starship Enterprise (at the same time) but nothing scary or unknown. Just regular stuff. It’s interesting that you brought up this topic, because one of my friends had severe macular degeneration, and is “legally blind” although she can see shapes and colors, and can read if she has on her special glasses and this crazy powerful magnifying glass. She can’t drive, so I took her to her eye doctor a few days ago, because she was having some issues. While we were driving, she asked me about my hallucinations with the Melatonin, because I have talked to her about it. She asked me to describe them. When I mentioned the neon lights, she told me that is exactly what she has seen and experienced for the last 20 years, ever since she started to develop macular degeneration. Only hers, instead of being seen floating around on the ceiling in the dark, are seen at random times, but in her peripheral vision. She has described what she is seeing many times, while it was happening. She and I both think that it may be something to do with the optic nerve. In her case, the nerve is deteriorating. In my case the medication is interfering with the normal activity. I would make a very bad drug addict, because I did not like the experience of the hallucinations one bit. When I was in my late teens and early twenties, plenty of my friends were smoking pot, and doing cocaine, and experimenting with “mushrooms” but I steered completely clear of all of that. I think sobriety is highly underrated. I don’t like the idea of being out of control, or in another dimension or whatever one wants to call it.