An ethical drug, one only dispensed on the prescription of a physician.

Of or relating to the study of ethics.

“The philosopher Kant is particularly known for his ethical writings.”

Of or relating to the accepted principles of right and wrong, especially those of some organization or profession.

“All employees must familiarize themselves with our ethical guidelines.”

Morally approvable; good.

“We are trying to decide what the most ethical course of action would be.”