Adequan and Aflutop are different drugs.
Adequan is synthesized from the extract of beef collagen from cow trachea. Due to the risk of BSE (mad cow), the human version (arteparon) was pulled from the market, and the vet version (Adequan) is very, very tightly controlled. Personally, I wouldn't risk it.
Aflutop is synthesized from fish. But the same idea.
Another great drug is Pentosan. Synthesized from beech tree cellulose. Some very, very promising results in controlled studies in Australia on arthritis of the knee. I've heard, hahaha, that the stuff is great and provides serious relief from joint pain. Also good for tendon / cartilage repair in general.