Viagra almost always helps the sexual side effects of the SSRI medications. Lexapro and Zoloft are usually not too bad for this side effect; Paxil is the worst offender.
There is a study with inositol and OCD where it helped. it is worth a try.
i don't know of any new drugs specifically for OCD.
again, the most effective treatment for OCD is usually cognitive behavior therapy so be sure you are doing it daily.
all best wishes,
Michael Jenike, MD