sedation

/sɪˈdeɪʃən/
noun
  1. The act of giving a person or animal a drug to make them calm or sleepy, especially before a medical procedure.
    • The veterinarian recommended sedation for the nervous dog before the X-ray.
    • The dentist used sedation to help the patient relax during the tooth extraction.
    • After the surgery, the patient remained under light sedation for a few hours.
  2. A state of calmness or sleepiness caused by a drug.
    • The doctor warned that the drug might cause sedation and advised against driving.
    • The medication caused mild sedation, so she felt drowsy all afternoon.
    • He was under deep sedation and did not remember the procedure.