For which client would the use of a phenothiazine most likely be contraindicated?
A client being treated for a traumatic brain injury.
A client with a history of ischemic heart disease.
A pediatric client.
A client with type 2 diabetes.
The Correct Answer is A
Phenothiazines are contraindicated in patients with suspected or established subcortical brain damage. Phenothiazines are a class of drugs that have antipsychotic, antiemetic, and sedative effects. They act by blocking dopamine receptors in the brain and can cause extrapyramidal symptoms, hypotension, and anticholinergic effects.
Choice B is wrong because phenothiazines are not contraindicated in patients with ischemic heart disease.
However, they can cause orthostatic hypotension and cardiac arrhythmias, so they should be used with caution and monitored closely in these patients.
Choice C is wrong because phenothiazines are not contraindicated in pediatric patients.
However, they can cause sedation, hypotension, and extrapyramidal symptoms, so they should be used with caution and at lower doses in these patients.
Choice D is wrong because phenothiazines are not contraindicated in patients with type 2 diabetes.
However, they can cause hyperglycemia and weight gain, so they should be used with caution and monitored closely in these patients.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
This is because antiemetics should be given to prevent motion sickness rather than after nausea or vomiting develop. Taking the medication 30 minutes before departing allows enough time for the drug to be absorbed and reach its peak effect.
Choice A is wrong because avoiding eating or drinking for 6 hours before the trip may cause dehydration and low blood sugar, which can worsen nausea and vomiting.
It is better to eat a light meal or snack before the trip and avoid spicy, greasy, or acidic foods.
Choice C is wrong because taking two doses if relief is not achieved may cause overdose and adverse effects.
Antiemetics should be taken as prescribed and not exceeded without consulting a doctor.
Choice D is wrong because increasing fluid intake to prevent urinary retention is not relevant for motion sickness.
Urinary retention is a possible side effect of some antiemetics, such as anticholinergics, but it is not a common problem for most people.
Fluid intake should be moderate and not excessive to avoid stomach distension.
Correct Answer is A
Explanation
This is because phenothiazines are contraindicated in patients with suspected or established subcortical brain damage. Phenothiazines can cause central nervous system effects such as drowsiness, dizziness, and extrapyramidal symptoms that may worsen the condition of a client with a brain injury.
Choice B is wrong because phenothiazines are not contraindicated in clients with ischemic heart disease.
However, they should be used with caution as they can cause hypotension and cardiac arrhythmias.
Choice C is wrong because phenothiazines are not contraindicated in pediatric clients.
However, they should be used with caution as they can cause sedation, anticholinergic effects, and paradoxical excitement.
Choice D is wrong because phenothiazines are not contraindicated in clients with type 2 diabetes.
However, they should be used with caution as they can cause hyperglycemia and alter the effects of antidiabetic drugs.
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