Found in the following dictionaries
OTCWL2014 (NASPA Word List 2014)
"Phentermine" Definition
noun
A drug that suppresses appetite by altering the body's metabolism of the neurotransmitters serotonin and norepinephrine, used in the management of obesity.
Source: American Heritage Dictionary
An appetite suppressant of the amphetamine and phenethylamine classes.
Source: Wiktionary
An anorectic drug CHN used in the form of its hydrochloride to treat obesity.
Source: Merriam-Webster
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