This is why Lysodren does not work well in ferrets. Lupron is a long-acting GnRH analog that stops the stimulation to the adrenal glands. This decreases the sex steroid and androgen production by the adrenal glands. This results in reduction in the size of the prostate or vulva,and hair growth. Lupron is an injectable product.
Most vets use the once a month version.
Dr. Weiss is using the once every 4 months version of Lupron depot. Either way Lupron is an expensive human product. Remember in human cancer treatment, cost is not a factor, but cost is a major factor in veterinary medicine. It comes in a monthly version and a 3 month version. This is also an expensive human product.