Other forms: side-effects
A side-effect is an unwanted result of taking a medicine. Common side-effects, a rare side-effect, no side-effects reported.
Every drug has some, and the leaflet in the box must list them by how often they occur. The hyphen is the older British spelling, and side effect without it is now at least as common.
1nounside-effectAn unwanted result of taking a medicine.
“Drowsiness is the side-effect people notice first.”
side-effect is an effect.
Practised in Body & Health