isosorbide vs medicinal drug

isosorbide and medicinal drug both are nouns.

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

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

isosorbide: drug (trade name Isordil) used to treat angina pectoris and congestive heart failure
medicinal drug: (medicine) something that treats or prevents or alleviates the symptoms of disease

Other hypernyms of isosorbide include medicament, medication, medicine.

isosorbide (noun)	medicinal drug (noun)
drug (trade name Isordil) used to treat angina pectoris and congestive heart failure	(medicine) something that treats or prevents or alleviates the symptoms of disease