pharmaceutic vs medicinal drug

pharmaceutic and medicinal drug both are nouns.

Word	Noun	Adjective	Verb	Adverb
pharmaceutic	Yes	Yes	No	No
medicinal drug	Yes	No	No	No

As nouns, medicinal drug is a hypernym of pharmaceutic; that is, medicinal drug is a word with a broader meaning than pharmaceutic:

pharmaceutic: drug or medicine that is prepared or dispensed in pharmacies and used in medical treatment
medicinal drug: (medicine) something that treats or prevents or alleviates the symptoms of disease

Other hypernyms of pharmaceutic include medicament, medication, medicine.

pharmaceutic (noun)	medicinal drug (noun)
drug or medicine that is prepared or dispensed in pharmacies and used in medical treatment	(medicine) something that treats or prevents or alleviates the symptoms of disease

pharmaceutic (adjective)	medicinal drug (adjective)
of or relating to pharmacy or pharmacists