Dexedrine vs pep pill

Dexedrine and pep pill both are nouns.

Word	Noun	Adjective	Verb	Adverb
Dexedrine	Yes	No	No	No
pep pill	Yes	No	No	No

As nouns, pep pill is a hypernym of Dexedrine; that is, pep pill is a word with a broader meaning than Dexedrine:

Dexedrine: an isomer of amphetamine (trade name Dexedrine) used as a central nervous system stimulant
pep pill: a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression

Other hypernyms of Dexedrine include amphetamine, speed, upper.

Dexedrine (noun)	pep pill (noun)
an isomer of amphetamine (trade name Dexedrine) used as a central nervous system stimulant	a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression