antiviral drug vs medication

antiviral drug and medication both are nouns.

Word	Noun	Adjective	Verb	Adverb
antiviral drug	Yes	No	No	No
medication	Yes	No	No	No

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

antiviral drug: any drug that destroys viruses
medication: (medicine) something that treats or prevents or alleviates the symptoms of disease

Other hypernyms of antiviral drug include medicament, medicinal drug, medicine.

antiviral drug (noun)	medication (noun)
any drug that destroys viruses	the act of treating with medicines or remedies
	(medicine) something that treats or prevents or alleviates the symptoms of disease