You may use ARTHRO-IONX or PROMAXOL to help with symptoms. I usually start with PROMAXOl but you can start with either. When I start with PROMAXOL, I use it until I see improvement and then switch to ARTHRO-IONX.
To dose the homeopathic I would split the dose and give a half dose with breakfast and a half dose with supper. You can give another two half doses through out the day if you need to. I would try to give it at a time away from the other medications so the body has time to focus on just the homeopathic. Once symptoms are under control you can switch to a whole dose once a day. In addition I would give PROBIOTICS, Vitamin C, OMEGA 3,6,9 and MSM.
What kind of water and food do you give your dog? These can influence joint health too.
I would recommend having a veterinary chiropractor check your dog. It often improves movement. Acupuncture can also be helpful.
Please let us know how you do.