What you are referring to are state medical boards, who universally claim it is unethical, as does the AMA. That does not make it illegal. All it means is that the medical board disproves of it. State medical boards disprove of lots of things doctors do regularly. You cannot get into legal trouble because of it.

I worked as a pharmacy technician in two nearby states and regularly filled prescriptions for doctors who wrote prescriptions for themselves and their family members. The pharmacist may tell you it's not considered ethical, but there is absolutely no legal restriction aginst it.

On top of that, I have done my rotation with several doctors who have discussed giving family members cold medication (cough syrups) and psych meds.

-yawkaw