Correct Answer: 3. Lorazepam (Ativan)
Explanation of the Correct Option
Lorazepam is a benzodiazepine, which is the recommended first-line pharmacotherapy for managing alcohol withdrawal syndrome (AWS) and preventing its serious complications, including withdrawal seizures. Benzodiazepines work by enhancing the effect of the neurotransmitter gamma-aminobutyric acid (GABA) at the GABA-A receptor. Chronic alcohol use suppresses the central nervous system (CNS) through a similar mechanism. When alcohol is abruptly discontinued, the CNS experiences a rebound hyperexcitability due to a deficiency in GABA-mediated inhibition. This neurochemical imbalance manifests clinically as the symptoms of AWS, ranging from anxiety and tremors to seizures. By administering a benzodiazepine like lorazepam, the nurse is effectively providing pharmacologic support to the deficient GABA system, thereby calming the hyperexcitable neurons and directly preventing the occurrence of withdrawal seizures. The provided research consistently identifies benzodiazepines as the standard against which other treatments are compared, reinforcing their role as first-line therapy [1,2,3,4].
Why the Other Options Are Incorrect
- Naltrexone (ReVia): This medication is an opioid receptor antagonist. It is used in the treatment of alcohol use disorder to reduce cravings and the rewarding effects of alcohol, but it has no role in the acute management of alcohol withdrawal or seizure prevention. Its mechanism does not address the GABA/glutamate imbalance that causes withdrawal symptoms.
- Disulfiram (Antabuse): This medication causes an aversive reaction (flushing, nausea, vomiting) when alcohol is consumed by inhibiting the enzyme aldehyde dehydrogenase. It is used as a deterrent to support long-term abstinence from alcohol. It has no therapeutic effect on the acute symptoms of withdrawal and cannot prevent seizures.
- Flumazenil (Romazicon): This medication is a benzodiazepine receptor antagonist. It is used as an antidote to reverse benzodiazepine overdose or sedation. Administering a benzodiazepine antagonist to a patient experiencing alcohol withdrawal would be dangerous, as it would further reduce GABAergic activity and could precipitate severe withdrawal symptoms, including seizures.
Clinical Application and NCLEX-RN Focus
For the NCLEX-RN, it is critical to associate the acute management of alcohol withdrawal, particularly the prevention of seizures, with benzodiazepines. The research abstracts provided support this by consistently referencing benzodiazepines as the conventional or first-line treatment protocol [1,2,3,4]. A key concept to understand is the principle of cross-tolerance. Benzodiazepines and alcohol both act on the GABA-A receptor, so a benzodiazepine can substitute for alcohol, stabilizing the hyperexcitable nervous system. The choice of a specific benzodiazepine, such as lorazepam, is often preferred in patients with impaired liver function because it undergoes extra-hepatic metabolism, unlike chlordiazepoxide or diazepam. The nurse's role includes monitoring the patient using a standardized withdrawal scale (like the CIWA-Ar) and administering the benzodiazepine according to a symptom-triggered or fixed-schedule protocol to achieve symptom control and prevent progression to severe complications like seizures and delirium tremens. The comparative studies in the provided materials explore phenobarbital as an alternative, but they do so by measuring its safety and efficacy
relative to the established standard of benzodiazepines, further confirming that benzodiazepines are the correct initial anticipation for a nurse [1,2,3,4].