Thank you both for responding. I took 5-HTP once a day at 100mg for 4 days in a row, last night being the last time, and already I've begun to feel horrible! Jesus Christ! I started tyrosine a couple weeks ago & it made me feel great, so I figured I better balance it with some 5-HTP... big mistake!
Very true - it depends on the individual.
I've heard serotonin referred to as the "misery hormome." I feel like there may be some truth to that... at least for some people.