I know one clinic that when those forms were signed, the physician would perform and document a discussion about risks and potential harms from using MMJ if that was what the patient chose to do.
"Some patients find that MMJ has benefits for xyz symptoms. However, there are risks. As a physician I cannot recommended smoking anything, as breathing in the products of combustion (burning stuff up) has been shown to be harmful generally harmful, more or less. It's not clear how much MJ smoke may cause harm. Other methods of administration, may increase or lessen some risks of harm from actual smoke. If you do choose to use MJ, I would recommend a method that avoids combustion with a flame.
I would urge caution as some other popular MJ products can be quite concentrated and may have more SEs, such as edibles or vaping.
I would advise against mixing MJ with other sedating medications. I would advise against driving or other potentially dangerous activities while using MJ.
While MJ is frequently used for nausea, it's possible to develop cyclical vomiting, which sounds like what it is, lots of continual vomiting from MJ use. If this happens the only effective treatment is to stop using MJ.
I was taught to mention that there is a small but real risk of inducing psychosis in some patients that seem susceptible.
I was taught to strongly advise against MJ use in anyone with a history of psychosis, or psychosis in a first degree relative, and not to sign a card in most instances.
I'm not sure I've covered this all perfectly, but it was policy in an otherwise conservative clinic where I know MMJ is done.
It doesn't exactly paint a picture of a physician that is holding a patient's hand down to the dispensary.