Adequan is approved for injection into your pet’s muscle. The muscles of the front of the thigh (quadriceps), lower back (lumbar), back of the front leg (triceps), and the back of the thigh (hamstring) are the most frequently used muscles for injection. There are important nerves and other structures near all these locations, so it is vital that you receive training from your veterinarian before performing any injections into your pet’s muscles.