anthelmintic vs medicinal drug

anthelmintic and medicinal drug both are nouns.

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

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

anthelmintic: a medication capable of causing the evacuation of parasitic intestinal worms
medicinal drug: (medicine) something that treats or prevents or alleviates the symptoms of disease

Other hypernyms of anthelmintic include medicament, medication, medicine.

anthelmintic (noun)	medicinal drug (noun)
a medication capable of causing the evacuation of parasitic intestinal worms	(medicine) something that treats or prevents or alleviates the symptoms of disease

anthelmintic (adjective)	medicinal drug (adjective)
capable of expelling or destroying parasitic worms