pentobarbital sodium vs pentobarbital

pentobarbital sodium and pentobarbital both are nouns.

Word	Noun	Adjective	Verb	Adverb
pentobarbital sodium	Yes	No	No	No
pentobarbital	Yes	No	No	No

As nouns, pentobarbital sodium and pentobarbital are synonyms defined as:

pentobarbital sodium and pentobarbital: a barbiturate (trade name Nembutal) used as a sedative and hypnotic and antispasmodic

Other synonyms of pentobarbital sodium include Nembutal, yellow jacket.

pentobarbital sodium (noun)	pentobarbital (noun)
a barbiturate (trade name Nembutal) used as a sedative and hypnotic and antispasmodic	a barbiturate (trade name Nembutal) used as a sedative and hypnotic and antispasmodic