Imuran vs medicinal drug

Imuran and medicinal drug both are nouns.

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

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

Imuran: an immunosuppressive drug (trade name Imuran) used to prevent rejection of a transplanted organ
medicinal drug: (medicine) something that treats or prevents or alleviates the symptoms of disease

Other hypernyms of Imuran include medicament, medication, medicine.

Imuran (noun)	medicinal drug (noun)
an immunosuppressive drug (trade name Imuran) used to prevent rejection of a transplanted organ	(medicine) something that treats or prevents or alleviates the symptoms of disease