hyperresponsive

/ˌhaɪpərrɪˈspɑnsɪv/
adjective
  1. Reacting or responding more strongly than normal to a stimulus, such as a substance, situation, or medical treatment.
    • People with asthma often have hyperresponsive airways that tighten easily in cold air.
    • The patient was hyperresponsive to the medication, experiencing side effects at a very low dose.
    • Some dogs are hyperresponsive to loud noises and become extremely anxious during thunderstorms.
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