Nothing is “put into marijuana” to make it medicinal - it is itself medicinal, and quite effective for a number of illnesses/conditions.
So is Valium if you regard treating the symptoms of a problem with narcotics as "Medicine."
But we all know this "Medicinal" argument is just bullsh*t. It's just an effort to get a foot in the door, before forcing it open to the much greater demand for recreational usage. This is incrementalism in progress.
Like lung cancer?