"Question for the board. When we get an indication approved, say the ART-bNAB-LL combination drug HIV cure, could a board-certified doctor prescribe it for any off-label use, say Alzheimer's?

Or are there limitations on that?"

Google's AI response says yes. There does not seem to be much limitation. However, for his/her own protection, I'm sure that they would be able to justify why they used it. Also, there might be limitations within their corporate affiliation. Additionally, insurance may have more to say about it, than anyone.

Here is the AI response:

Yes, a doctor can legally use a drug to treat a different indication than what it is officially approved for ("off-label use" as long as they have a strong medical rationale, are well-informed about the potential risks and benefits, and discuss the off-label use with the patient and obtain their informed consent; however, they should always practice within the standard of care for their medical field.
Key points about off-label drug use:
Legality:
It is legal for doctors to prescribe drugs off-label.
Informed decision:
Doctors should thoroughly research the potential benefits and risks of the off-label use before prescribing.
Patient consent:
It is crucial to inform the patient about the off-label use and obtain their consent.
Medical rationale:
The decision to use a drug off-label should be based on sound medical evidence and not just anecdotal information.
Potential risks:
Off-label use may have unknown side effects or interactions with other medications.