Definition of side effect in English:

side effect


  • A secondary, typically undesirable effect of a drug or medical treatment.

    ‘many anticancer drugs now in use have toxic side effects’
    • ‘A side effect of many of these drugs is sedation, so it's better to take them before going to sleep at night.’
    • ‘Researchers may have found a side effect associated with stress which could lead to premature aging.’
    • ‘Blurred vision is a common side effect, but it usually goes away on its own within a couple of weeks.’
    • ‘But the side effect intrigued him into the exact workings of the hormone.’
    • ‘Most of those who had had a stroke were aware of their own drug treatment and were concerned about the side effect of drugs.’
    • ‘My dad has to take Provigil to counteract the drowsiness side effect of his other medication.’
    • ‘Tiredness is a side effect that can be experienced by anyone undergoing radiation.’
    • ‘Cough was the only side effect that was more prevalent in this group than in the placebo group.’
    • ‘The most common side effect of the influenza vaccine is soreness at the vaccination site.’
    • ‘She went deaf when she was a baby, before the age of the cochlear implant, as a side effect of polio.’
    • ‘She thinks the only lasting side effect from the treatment may be some memory loss.’
    • ‘Some people are able to use a different kind of statin without the same side effect.’
    • ‘Scarring can also be a side effect or complication of other conditions.’
    • ‘Tell your doctor if you have had a particular side effect from a pain medication in the past.’
    • ‘Diarrhea is a common side effect of tube feedings in the intensive care unit.’
    • ‘If priapism has occurred as a side effect of medication then a different medication can usually be prescribed.’
    • ‘Be sure to tell your doctor about any changes in your body that might be a side effect from the medicine.’
    • ‘If the radiation is aimed at your abdominal or pelvic area, diarrhea may be a side effect.’
    • ‘Cough, a side effect not related to dose, was severe enough to prohibit further use in only three patients.’
    • ‘Alcohol has a side effect and may impact your ability to do what you need to do when you need to do it, even the next day.’
    side effect, consequence, entailment, corollary, concomitant
    View synonyms


side effect

/ˈsīd əˌfekt/