Just wanted to echo the positive experiences reported here. After a bit of internet research, I kind of guessed at a regimen that might work for me, which is one 250mg rhodiola capsule before breakfast, one before lunch, and then 50mg 5-HTP before bed. In fact I found this site because I Googled "5-HTP" and "rhodiola" to see if there was any danger in taking them both, but I see several of you have also come up with a similar plan. Very assuring, and I have to say I felt a bit of triumph for having arrived at the same conclusion that others have made of my own accord.
Anyway, I've been taking it for a short while and I am still flabbergasted at how effective it is. I really just can't get over it. I could feel the effects after the very first dose of rhodiola. Not only did it improve my mood, it made me feel, well, happy! And it improved my personality. Low seratonin levels were impacting my life in many negative ways but now I am a new person.
Also it seems to have eliminated my morning headaches and neck stiffness, but I can't say whether that is attributed to the rhodiola or the 5-HTP. From what I've read it may likely be the 5-HTP.
However as others have stated, I would take caution in the dosage of rhodiola. I have found that if I take the afternoon dose too close to the morning dose, I do become a bit jittery and restless. Still happy--not nervous--but jittery and restless nonetheless.
Rhodiola is obviously powerful stuff and I'm sure it's not for everyone, but if you are the type of person that it can benefit, then like the others here that have reported positive experiences, I think you'll be astounded as to how effective it can be.