I've been wondering if I could make a time-release system for melatonin, since I often feel it wearing off after a few hours of trying to get to sleep, and the time-release pills are much more expensive than the instant-release ones. I saw a bottle of 60 x 10mg melatonin pills on sale for £5.99, and maybe if I emptied out the contents, mixed it with some honey, injected the mixture into jumbo rasins and swallowed them whole, it would slowly leach out and be absorbed into my blood stream over the course of the night.