Along with the family taking antihistamines for your allergies, do you bathe your dog regularly? My mom and I are allergic to our Dobermans, and that's what we do. Winston and Keira both get bathed every 2 weeks, with a mild shampoo and conditioner so as not to bother their skin, and doing that helps us a lot. Aside from that, I don't know what you could do. Maybe someone else will have more suggestions.