The recommended target range for good control of the cortisol production is a result of 1-5 ug/dl for both the pre and post ACTH stimulation test numbers. An ACTH stimulation test is done as soon as it is suspected that the dog is loaded, to confirm if a successful loading has been achieved.
An ACTH stim test is done again after a month of giving the weekly maintenance dose and another ACTH stim test is performed after three months of maintenance therapy, to be sure that the weekly maintenance dose of Lysodren is correct for the individual dog. An ACTH stim test should then be performed every 4 to 6 months to monitor the cortisol production and to determine if any dose changes may be needed along the way. Any changes in the dog's eating or drinking habits or behavior should be reported to the Vet immediately and an ACTH stim test will likely be needed to check the dog's cortisol levels and to see if the dose needs adjusting.