Hi,
I see that your granddaughter is now an adult and not in treatment? My daughter was dx at age 7 and took Ssri meds like prozac, zoloft, and several of the newer antipsychotics such as Seroquel, Respiredol, Geodon, and Zyprexa (1 at a time. Zyprexa packed on the weight very quickly.) She also had tons of therapy. At 31 now, she has not taken meds nce her first daughter was conceived 9 years ago. She learned techniques to deal with the OCD without meds. She says at times it's difficult to cope with but for the most part, no real problem. I am so proud of her. She got 2 degrees and has a great job!
My guess is your granddaughter won't go for any form of treatment until the OCD affects her daily life enough to push her to get help. That can happen sooner if it manifests in very disruptive ways: such as staying up all night to clean, or having to shower repeatedly.
I guess you can share info with her and hope she soon will get help. Does she agree she has ocd? Thats a start. If she doesn't want meds, hopefully you can find professionals who know how to do the therapy for this. I believe called aversion therapy. Wishing you the best, Cathy