I don't personally think that people need to take 5-Htp to help them with mdma.
I find eating certain foods (and no not eating healthily necessary and all that yadada), and taking a minimum of 1 month break, Leaves me in such a state.
I took a 150mg mdma capsule, pure mdma crystals, and when i come up, was so hard, i didnt even gurn, it was a pure open mouth smile like this =[) In fact, i could hear and feel my jaw crunch the second it hit me and my mouth swung open, I also lost vision for about 30 minutes, then i seemed to have a psychoactive stimulant experience shall we call it? Pure Bliss.
Every time.
Overall it lasts a good 5 hours minumum (effects lessen obviously over them hours)