Paroxetine
depression
"Recently diagnosed with Polycythemia Vera (a blood cancer), one of the side effects was severe itching for about half an hour after contact with water (morning shower).   Started taking a low dose of Peroxetine and the itching reduced considerably after about a week of use.   

I have now used the medication for a few months and have noticed the additional side effect of having difficulty "completing" when having sex."