Although I have never tried the brand name Helios, I have tried injectable yohimbine HCL (w/o clen). It made me swell up like a blimp, after a week I was sick of it, but stuck with it. Ran it for 2 weeks, on the 2nd week I got an abscess. I would steer far far away from injecting myself with clen.
Btw...this was via suggestions I got from a buddy working with dan duchaine, so not all of Dan's theories panned out as you can see.