In relation to alcohol withdrawal, which mechanism is listed for quetiapine in the material?

• A. Increase GABA activity to reduce excitability
• B. Increase glutamate activity
• C. Inhibit acetylcholine receptors
• D. Block opioid receptors

Answer: (A)

In alcohol withdrawal, the brain shifts toward hyperexcitability because GABAergic inhibition wanes while excitatory systems (like glutamate) become more active. If the material lists quetiapine as increasing GABA activity to reduce this excitability, the idea is that boosting inhibitory GABA signaling helps dampen the overactive nervous system, reducing agitation, anxiety, and the risk of seizures. This fits the goal of calming withdrawal symptoms by enhancing the main brake on neuronal firing. The other proposed mechanisms don’t directly counteract withdrawal hyperexcitability—glutamate increases would worsen it, blocking acetylcholine receptors or opioid receptors wouldn’t specifically address the withdrawal neurochemistry.