The "perscription system" used to be that you'd have to go see a doctor, the doctor knew who you were, and would make decisions on what prescriptions/medications you should be given.

Due to drug advertising rules, the prescription system has been turned on its head, and the patient now goes to their doctor asking for a specific prescription.

Telemedicine took advantage of this and has effectively removed the middleman (the doctor) in many cases and you just sign-up look at a person on a camera, and get your drugs sent to you.