Percorten-V (desoxycorticosterone pivalate) is the only medication approved by the FDA for treating Canine Addison's Disease (hypoadrenocorticism). Percorten-V requires a prescription from your veterinarian. You will need a syringe to use Percorten-V, but it is not included in the package.
Methimazole is used to treat hyperthyroidism in cats. It has largely replaced propylthiouracil in this treatment process since it has a lower incidence of adverse side effects. Methimazole requires a prescription from your veterinarian, and is sold per tablet.
The 3cc (3ml) Luer-Slip syringe with 3/4" 22 g Needle is a syringe that works with Adequan, which controls the symptoms of arthritis, or Percorten-V, which controls Addison's Disease. The syringe comes with a needle and allows up to 3 cc (3 ml) of medication for your pet.