While I believe that the " medical marijuana" movement is a farce being used to legalize pot for recreational use there may be a small percentage of folks that could benefit from derivatives.
According to the article the lady is taking derivatives that do not contain the psychoactive substances.
Improved cultivation produces a better product but the basic genetics of the plant are no different than they were 10,000 years ago. As far as ‘one toke’ goes it is possible to control the diaphragm and limit inspiration.