Zovirax vs medicinal drug

Zovirax and medicinal drug both are nouns.

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

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

Zovirax: an oral antiviral drug (trade name Zovirax) used to treat genital herpes; does not cure the disease but relieves the symptoms
medicinal drug: (medicine) something that treats or prevents or alleviates the symptoms of disease

Other hypernyms of Zovirax include medicament, medication, medicine.

Zovirax (noun)	medicinal drug (noun)
an oral antiviral drug (trade name Zovirax) used to treat genital herpes; does not cure the disease but relieves the symptoms	(medicine) something that treats or prevents or alleviates the symptoms of disease