This is taken from DEA notices 2001:
"For purposes of state law, many state authorities, with the endorsement of medical societies, consider the existence of the following four elements as an indication that a legitimate doctor/patient relationship has been established:

A patient has a medical complaint;

A medical history has been taken;

A physical examination has been performed; and
[[Page 21183]]

Some logical connection exists between the medical complaint, the medical history, the physical examination, and the drug prescribed."

According to The notices,of witch Ive allready given the link, if these requirements arent met befor prescibing, its illegal~