Physicians constantly ask pharma about and explore off label drug prescriptions. This is legal: psychiatrist can tell you to take a drug approved for nerve pain for depression. There is research showing it works for depression but it has not technically been added to the label of the drug yet following fda approval. Pharma can provide the studies and answer limited questions on the topic (but no clear guidance) but cannot "promote" this. Is presenting the research promotion? Is the rep discussing it with the doctor promotion? Etc