This was taken shortly after I started the treatment (I actually did praziquantal powder not Prazipro, it's stronger, but you have to predissolve the powder in vodka because it's not soluble in water):
Here's a more recent shot now ..
I remember distinctly that he did exhibit some head twitching at the beginning. Soooo ... if I were in your situation I'd be thinking of prazipro too.
Good luck and I hope this info is helpful.