https://ajp.psychiatryonline.org/doi/10.1176/appi.ajp.158.5.818-a

Basically, they suggest that methylphenidate can worsen OCD symptoms, while amphetamine can reduce them. The patient in this case report had tried many treatments, including high doses of SSRIs, behavior therapy, and deep brain stimulation, but nothing helped. His son, by chance, was prescribed Adderall and he wanted to test it before allowing his son to. It alleviated his OCD, but soon wore off. He then had his dose increased due to his positive response to Adderall (I wonder how that conversation went).

I don't encourage you to go out and just start taking Adderall. But I know that my Vyvanse has taken away most of my OCD symptoms that had paralyzed me for years. Docs tried me on everything, and I finally found relief for many things such as depression and OCD on Vyvanse, while being treated for ADHD.

Unfortunately, I fucked it up by going off the rails for a while, but I had to learn the hard way. I've found something precious, prescribed (so I know what it is) and that has been just short of miraculous.