I took this for a while and still take it occasionally. You mean 5htp don't you, it's a herb which gives your body the ability to make serotonin so it lifts your mood. It mustn't be taken with drugs called SSRI s.
I didn't take it for insomnia or menopausal symptoms but for depression. I liked it because it lifted my mood enough to let me get on with life but it wasn't addictive and I didn't suffer side effects. I'm very sensitive to drugs and SSRIs left me feeling hammered. I found St John's Wort made me feel agitated.
I find now that it helps with SAD, our winter greyness drags me down. Everyone reacts differently so I'd say try it with caution but if you don't overdose I believe there are no known side effects. Hope that helps.