paregoric vs medicinal drug

paregoric and medicinal drug both are nouns.

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

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

paregoric: medicine used to treat diarrhea
medicinal drug: (medicine) something that treats or prevents or alleviates the symptoms of disease

Other hypernyms of paregoric include medicament, medication, medicine.

paregoric (noun)	medicinal drug (noun)
medicine used to treat diarrhea	(medicine) something that treats or prevents or alleviates the symptoms of disease