Periactin vs cyproheptadine

Periactin and cyproheptadine both are nouns.

Word	Noun	Adjective	Verb	Adverb
Periactin	Yes	No	No	No
cyproheptadine	Yes	No	No	No

As nouns, Periactin and cyproheptadine are synonyms defined as:

Periactin and cyproheptadine: an antihistamine (trade name Periactin) used to treat some allergic reactions

Periactin (noun)	cyproheptadine (noun)
an antihistamine (trade name Periactin) used to treat some allergic reactions	an antihistamine (trade name Periactin) used to treat some allergic reactions