The physician prescribes alprazolam (Xanax) 0.25 mg p.o. TID for a client with anxiety and physical symptoms related to work pressures. The nurse should assess the client for the most common adverse effect of this drug, which is?

A Drowsiness

explanation

Benzodiazepines potentiate the action of GABA, enhance presympathetic inhibition, and inhibit spinal polysynaptic afferent pathways; drowsiness, dizziness, and blurred vision are common adverse effects.