Ethical drugs are drugs with data exclusivity, i.e., can be made/sold only by the company that developed them, under prescription.
"Generic drugs are copies of brand-name drugs that have exactly the same dosage, intended use, effects, side effects, route of administration, risks, safety, and strength as the original drug. In other words, their pharmacological effects are exactly the same as those of their brand-name counterparts".

Here, the patient is switching from one drug to another, ethical/generic, generic/generic, etc.