an extra and usually bad effect that a drug has on you, as well as curing illness or pain
Example:
- The drug has few side effects.
- Side effects include skin rashes and nausea.
Extra examples:
- The medication can have adverse side effects on the patient.
- The patient suffered severe side effects from the drug.
- The treatment has some unfortunate side effects.
an unexpected result of a situation or course of action that happens as well as the result you were aiming for
Example:
- Opponents of the policy fear that it could have unfortunate side effects on the economy.