Demerol vs meperidine

Demerol and meperidine both are nouns.

Word	Noun	Adjective	Verb	Adverb
Demerol	Yes	No	No	No
meperidine	Yes	No	No	No

As nouns, Demerol and meperidine are synonyms defined as:

Demerol and meperidine: a synthetic narcotic drug (trade name Demerol) used to treat pain

Other synonyms of Demerol include meperidine hydrochloride.

Demerol (noun)	meperidine (noun)
a synthetic narcotic drug (trade name Demerol) used to treat pain	a synthetic narcotic drug (trade name Demerol) used to treat pain