All the information you need on dosing Jiaogulan can be found in the files: https://ecir.groups.io/g/main/files/Pain%20Medication%20and%20Alternatives/Jiaogulan,%20Nitric%20Oxide%20Support,%20AAKG%20and%20Supps

For horses on doses of pergolide over the standard 1mg dosage it is much more cost effective to use compounded medication instead of Prascend. BI does a good job convincing many vets to not write scripts for compounded but since you have a vet who will do that for you, stick with the compounded and ignore the woman at the office.  As long as your horse's ACTH is controlled you are not 'throwing your money away'.