A nurse is preparing to administer haloperidol 5 mg IM to a client. The amount available is haloperidol 20 mg/mL. How many mL should the nurse administer?
(Round the answer to the nearest hundredth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["0.25"]
To calculate the volume of haloperidol solution needed, we can use the formula:
Volume (mL)=Dose (mg)/Concentration (mg/mL)
Given: Dose of haloperidol = 5 mg
Concentration of haloperidol solution = 20 mg/mL
Substituting the given values into the formula:
Volume (mL)=5 mg/20 mg/mL
Volume (mL)=5/20
Volume (mL)=0.25 mL
Rounded to the nearest hundredth, the nurse should administer 0.25 mL of haloperidol solution.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. A pretreatment electroencephalogram (EEG) is not typically required before starting valproate therapy. EEGs may be used in the diagnosis and management of seizure disorders, but they are not a standard part of valproate therapy initiation.
B. High serum sodium levels are not associated with toxic levels of valproate. Instead, valproate can cause hyperammonemia, especially in individuals with urea cycle disorders.
C. Thyroid function tests are not typically required specifically for valproate therapy. However, valproate may interfere with thyroid hormone levels, so thyroid function tests might be ordered if there are symptoms of thyroid dysfunction.
D. Monitoring liver function tests is essential when taking valproate because the medication can cause hepatotoxicity. Clients should have baseline liver function tests before starting valproate, followed by regular monitoring throughout treatment. If liver function test results indicate liver damage, the healthcare provider may adjust the dosage or discontinue the medication. Therefore, this is the correct instruction to provide to the client starting valproate therapy.
Correct Answer is D
Explanation
A. Bleeding: While haloperidol can cause side effects such as orthostatic hypotension and sedation, it is not typically associated with bleeding as a common adverse effect.
B. Pancreatitis: Pancreatitis is not a common adverse effect of haloperidol. However, it can cause gastrointestinal side effects such as constipation, nausea, and vomiting.
C. Cataracts: Haloperidol is not known to cause cataracts. However, long-term use of antipsychotic medications, including haloperidol, may increase the risk of developing metabolic side effects such as weight gain, dyslipidemia, and hyperglycemia, which can contribute to conditions like diabetes and potentially increase the risk of cataracts.
D. Dysrhythmias: Haloperidol can prolong the QT interval on an electrocardiogram (ECG), leading to an increased risk of dysrhythmias, including torsades de pointes. This risk is particularly important in clients with preexisting cardiovascular conditions or those taking other medications that can prolong the QT interval. Therefore, nurses should monitor clients receiving haloperidol for signs of dysrhythmias, including palpitations, dizziness, and syncope, and promptly report any abnormalities to the healthcare provider.
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