I am not a doctor or professional of any kind, but I'd like to offer my personal experience here, if you don't mind.
I've had OCD for as long as I can remember. It's 24/7 in my brain--counting and tracking and correcting numbers and letters. I chew my nails obsessively, nearly every waking moment and it's driven by the OCD, by needing perfection, why is there a rough spot, let me bite that off... And it goes to the point of bleeding sometimes. It hurts incredibly, but I can't stop.
All kinds of psych meds have never helped it at all.
But once, I was put on topiramate for seizures. It all stopped. Vanished. It was surreal, my mind was empty. My fingernails grew for the first time in over 30 years. It was fucking wild. But I encountered a dangerous side effect, I started having physical tics and spasms that I couldn't control and was taken off of it--the right decision, but heartbreaking. All of the Hell of my OCD rituals and obsessions returned.