If yes, you are likely eligible for the medication coverage provided through Correctional Services Canada. This department is required to provide all essential health care, including medications, while you are in the federal correctional system.
The program relies on a formulary that specifies which medicines are covered and under what circumstances. The formulary is not available publicly. The formulary is restricted to a relatively small number of approved treatments, but if the medicine you need is not listed, your prescriber can submit a written request, that includes the specific medical reasons why you need this medication even though it is not listed. The request would be reviewed and a decision made about whether or not this medication would be reimbursed for you.
For more information about coverage, please see the Correctional Services Canada website.