I'm guessing L-dopa, or a dopamine agonist, peter?
I've been on one of the latter, piribedil, that I trialled along with the histamine-modulating drug betahistine, as part of a nootropic regime. Found no hint of any satyrisis though (thankfully...there seems to be a shortage of Kanner's and HFA girls. I do date aspies also, but the former are my sexual preference by a long shot)
If I'm right in my guessing, I.e a DA receptor agonist, or L-DOPA (as L-DOPA/carbidopa combination of course), its not just sexual mania they can cause, but they have been known to induce compulsive spending, and gambling, as well as increased impulsivity
You have mentioned paralytic episodes, muscle pain and stiffness
Have you been checked for parkinson's? do you also get muscle tremors, and perhaps have to move slowly?