I believe that the medicine manages the levels of hormones that the parasite manipulates into destabilizing patterns. The ideal dose is 100 milligrams, every 12 hours. You can likely get away with waking and sleeping; those from my world did. I can conjure a vial with hundreds of doses, and will provide the means to make more to others, in case I cannot be reached.

Do you know how to inject yourself from a syringe? I would create a simpler autodosing pen or pump but lack the mechanical knowledge. [There's a note of frustration, there.]