Posting this partly as a warning to anyone who might be considering taking melatonin for sleeping issues, and partly as a query to see if anyone here has had a similar experience.
I have been sleeping badly for over two weeks due to severe jetlag -- a 10 day trip 12 time zones away where I had just gotten adjusted and then had to come back and deal with the jetlag the opposite direction. Very stressed during that period, too -- working 10-12 hour days, no time/energy to exercise, eating foods that I know mess with my physical and mental well-being, etc. Oh, and my job limbo just keeps dragging on and on, though at least now I know they aren't going to give me the "big job". Still stressed and annoyed that I don't really know what job they ARE going to give me, and what they are going to pay me for it, though. Anyhoo...
After 5 nights of only getting 2-3 hours of sleep, I was pretty much at my wits end and DH suggested I try taking melatonin. He has taken it in the past when he's had a bout of insomnia and it works well for him. So I took my first one Thursday night. It did seem to help me sleep better -- slept from about 10pm to 3 am. Had an insane day at work Friday and didn't manage to leave the office for home until about 8:30 (had arrived at 7:45 am). When I called DH on my way home, I suddenly felt like sobbing. I put it down to a long, tiring day. Took another melatonin before finally heading to bed around 12:00 am. Woke up at 3am feeling HORRIBLE both physically and emotionally. I've had major depressive episodes in the past and this feeling was comparable to the worst I've felt during those. Listless, no energy for anything but sitting on the couch, on the verge of bursting into tears all day. Just awful. Had important work stuff I should have been dealing with and just couldn't bring myself to do it. Every time I thought about it I wanted to lay down and cry. Managed to slog through the day, dozing off and on, and finally went to bed around 8pm. Took another melatonin, thinking it would help me sleep better again. Woke up at 1am. Feeling just as awful as the day before, if not worse.
Finally it occurred to me that this horrible feeling may have been triggered by the melatonin. Lightbulb moment. Quick web search verified that it can indeed exacerbate depression in some people. Spent all day yesterday feeling awful again, but at least hoping that maybe once it wore off I would be back to normal.
Last night no melatonin. Slept from 10-4. Woke up feeling like myself again -- yay! Went to the gym later to boost the endorphins and make sure I don't get back in that funk again.
I was really surprised that it affected me that way. I've been taking 5HTP since last fall, and it seems to help stabilize my moods without any negative side effects. This was SOOOO radically different. Brain chemistry is really subtle.
So, has anyone else had an episode like this or am I just a freak of nature? Curious....