Sometimes, it takes a while for a medicine to get federal approval.
So, people sign up for clinical trials.
When the clinical trials are full, the desperate go overseas for medical treatment.
When Doctor Odd came down with a terminal illness he couldn’t cure himself, he got desperate and went to an alternate dimension for medical treatment.
After several hops across the dimensions, Doctor Odd met Shaman Odd, who brewed a magical potion to cure Doctor Odd’s condition.
Doctor Odd brought the potion back with him, studied it carefully in his lab, and patented the cure.
The profits were astronomical.