Post navigation Next ArticlePrevious Article Domperidone response test ·6 June 2017 Domperidone has an inhibitory effect on dopamine. When administered, the pituitary gland of PPID horses will produce much more ACTH. In healthy horses this will hardly ever be the case. Tweet Share Pin it Comment Leave a Reply Cancel reply Your email address will not be published. Required fields are marked *Name * Email * Website Comment By using this form you agree with the storage and handling of your data by this website. * Notify me of new posts by email.