In this study we see that Prami lowers Prolactin(yess) and in my experience i feel its awsome for sex faster recovery and more random boner as prolactin's dutie is to lower your cock after an orgasm.
And we also observe Prami increases GH dose dependent. Doesnt say how much but i dont think its alot anyways here you go
http://www.ncbi.nlm.nih.gov/m/pubmed/1350237/