You do not have to renew your controlled substance license unless you are currently prescribing or dispensing controlled substances in Michigan. You can get your controlled substance license reinstated at a later time as long as your professional license is active in Michigan. You would do this by submitting a Controlled Substance Application that we would mail to you upon request or you can download the form. You can find a controlled substance application to download in the application packets provided for your profession under the "Forms and Applications" section.