Found in the following dictionaries
OTCWL2014 (NASPA Word List 2014)
"Sumatriptan" Definition
noun
A vasoconstrictive drug, c14h21n3o2s·c4h6o4, used to treat migraine headache.
Source: American Heritage Dictionary
A drug used for the treatment of migraine headaches.
Source: Wiktionary
A triptan CHNOS that is administered as a nasal spray or in the form of its succinate by mouth or by injection and is used in the treatment of migraine attacks.
Source: Merriam-Webster
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