Which of the following is NOT a side effect of Imitrex (Sumatriptan)?

Imitrex (Sumatriptan) is a medication commonly used to treat migraines. Among its potential side effects, chest pain, pressure in the chest or throat, and dizziness are commonly reported. These side effects are related to the vasoconstrictive properties of the drug, which can cause sensations of tightness or discomfort in the chest area as well as dizziness related to changes in blood flow.

Diarrhea, however, is not typically considered a side effect of Imitrex. While gastrointestinal symptoms can occur with various medications, they are not commonly associated with the usage of Sumatriptan. The focus of Imitrex’s side effects tends to be more on the cardiovascular and neurological aspects rather than gastrointestinal disturbances. This context supports the conclusion that diarrhea is the correct choice for the symptom that is NOT a side effect of Imitrex.