Falling oxygen saturation, slowed or shallow breathing, or loss of response to verbal stimuli signals oversedation; stop the drug, support the airway, and prepare reversal agents.
Before you read
Test yourself first: 5 questions
Question 1 of 5
A nurse finds an unconscious client with type 1 diabetes who has no IV access and a blood glucose of 38 mg/dL. Which medication should the nurse administer?
Answer: B. For severe hypoglycemia in an unconscious client without IV access, glucagon (IM or subcutaneous) is the treatment of choice. It mobilizes glucose from glycogen stores. Oral carbohydrate is contraindicated due to aspiration risk in an unconscious client.
Question 2 of 5
A client with a known benzodiazepine overdose is being treated. The nurse knows flumazenil may be used but recognizes which important caution?
Answer: A. Flumazenil is a benzodiazepine antagonist that can reverse sedation, but it can precipitate seizures, especially in clients who are benzodiazepine-dependent or who have co-ingested seizure-lowering substances, and seizures can be difficult to control because the benzodiazepine reversal removes seizure protection. It is used cautiously and not routinely. It does not reverse opioids, and it is not free of risk.
Question 3 of 5
A nurse finds a client with diabetes who is taking insulin to be confused, diaphoretic, and shaky. The client is awake and able to swallow. Which action should the nurse take first?
Answer: B. The client is showing signs of hypoglycemia and is conscious and able to swallow, so the first action is to give a fast-acting oral carbohydrate, such as 15 grams of glucose (juice, glucose tablets). IV dextrose or glucagon is reserved for clients who cannot safely swallow. Checking glucose should not delay treatment of symptomatic hypoglycemia in an alert client.
Question 4 of 5
A nurse administers a beta-2 agonist bronchodilator to a client. Which finding would the nurse expect as a common adverse effect of this drug class?
Answer: A. Beta-2 agonists such as albuterol can stimulate beta-1 receptors at higher doses and commonly cause tachycardia, tremor, and nervousness. These effects result from sympathetic stimulation. Bradycardia, hypotension, and sedation are not expected; beta agonists tend to raise heart rate and cause stimulation rather than sedation.
Question 5 of 5
A client with moderate-to-severe Alzheimer disease is started on memantine. The nurse understands this drug works by which mechanism?
Answer: A. Memantine is an N-methyl-D-aspartate (NMDA) receptor antagonist that modulates glutamate activity, which is thought to protect neurons from excitotoxicity. It is not a cholinesterase inhibitor, a dopamine agonist, or a benzodiazepine.
Keep the streak going with more questions like these, each with a full rationale.
What is moderate (conscious) sedation?
It is used for procedures like endoscopy, cardioversion, and minor surgery. Common agents include midazolam, fentanyl, and propofol. The nurse monitoring the patient must do nothing else and watch continuously for respiratory depression, the main risk.
Key points to remember
- The patient retains protective reflexes, breathes independently, and responds purposefully to verbal commands and light touch.
- Respiratory depression and airway compromise are the primary risks, especially with opioids and benzodiazepines combined.
- Continuous monitoring of oxygen saturation, respiratory rate, blood pressure, heart rate, and level of consciousness is required throughout.
- Reversal agents must be immediately available: flumazenil for benzodiazepines and naloxone for opioids.
- Emergency airway equipment, suction, oxygen, and resuscitation drugs must be at the bedside before sedation begins.
- Recovery is monitored until the patient returns to baseline level of consciousness and stable vital signs before discharge.
Nursing priorities
- Verify informed consent, NPO status, baseline vitals, and a patent IV before sedation begins.
- Have a dedicated nurse continuously monitor airway, breathing, SpO2, level of consciousness, and vitals with no competing duties.
- Ensure oxygen, suction, an Ambu bag, emergency airway equipment, and reversal agents (naloxone, flumazenil) are at the bedside.
- Titrate sedation slowly per orders and stop/notify the provider at any sign of respiratory depression.
- Continue close monitoring during recovery until the patient meets discharge criteria (alert, stable vitals, protective reflexes intact).
Labs & values
Patient teaching
- You may feel drowsy and not remember the procedure; this is expected.
- Do not drive, operate machinery, sign legal documents, or drink alcohol for 24 hours.
- Have a responsible adult drive you home and stay with you after the procedure.
Red flags: report now
- Falling oxygen saturation, slowed or shallow breathing, or loss of response to verbal stimuli signals oversedation; stop the drug, support the airway, and prepare reversal agents.
- If the patient cannot be aroused or stops protecting the airway, sedation has deepened beyond moderate; this is an emergency.
- Never leave a sedated patient unattended or assign the monitoring nurse other tasks.
- Apnea or airway obstruction requires immediate bag-mask ventilation and reversal-agent administration.
References
Clinical references for this topic
