During the nursing assessment, which finding is least likely related to drowsiness in a client on phenobarbital?

The finding of increased alertness is least likely related to drowsiness in a client taking phenobarbital. Phenobarbital is a barbiturate medication commonly used to manage seizures and induce sedation. One of its primary side effects is drowsiness or sedation, which means that patients often experience decreased levels of alertness while on this medication.

In contrast, decreased appetite, lack of energy, and extended sleep episodes are all signs that can be associated with drowsiness or sedation. Decreased appetite may occur due to general malaise or sedation effects, while lack of energy is a common consequence of feeling drowsy. Extended sleep episodes may result from the sedative properties of phenobarbital, leading to prolonged periods of sleep or increased sleepiness. Thus, increased alertness is not congruent with the expected effects of phenobarbital.