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What does adverse mean?

Looking for the meaning or definition of the word adverse? Here's what it means.

Adjective
  1. Unfavorable; antagonistic in purpose or effect; hostile; actively opposing one's interests or wishes; contrary to one's welfare; acting against; working in an opposing direction.
  2. Opposed; contrary; opposing one's interests or desire.
  3. (not comparable) Opposite; confronting.
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Examples
The delays in according immigration status can have significant adverse effects upon a successful asylum seeker.
If you don't have an adverse reaction, the allergen dose is increased each time you receive a shot.
Patients were reassessed on day 4 of therapy for clinical and laboratory responses and for adverse reactions to the medication.
Twenty-five patients experienced adverse drug reactions, but only 12 of them needed drug modifications.
Vaccinia immune globulin is a first-line therapy for certain adverse reactions to smallpox vaccine.
Other adverse effects of ticlopidine include neutropenia, adverse skin reactions and gastrointestinal side effects.

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