eth·i·cal 
(ĕthĭ-kəl)
(ĕthĭ-kəl)adj.
1. Of, relating to, or dealing with ethics: an ethical treatise.
2. Being in accordance with the accepted principles of right and wrong that govern the conduct of a profession: an ethical act. See Synonyms at moral.
3. Relating to or being a drug dispensed solely on the prescription of a physician.
ethi·cal·ly adv.
ethi·cal·ness, eth′i·cali·ty (-kălĭ-tē) n.