The barbiturate phenobarbital is prescribed for a patient with epilepsy. While assessing the patient's current medications, the nurse recognizes that interactions may occur with which drugs? (Select all that apply.)
Oral contraceptives
Antihistamines
Warfarin
Opioids
Diuretics
Correct Answer : A,D,E
A. Oral contraceptives: Phenobarbital can decrease the effectiveness of oral contraceptives, increasing the risk of contraceptive failure and unintended pregnancy.
B. Antihistamines: While phenobarbital can induce hepatic enzymes, leading to increased
metabolism of some antihistamines, this interaction is less clinically significant compared to the interactions with oral contraceptives, opioids, and diuretics.
C. Warfarin: Phenobarbital can induce the metabolism of warfarin, potentially reducing its anticoagulant effects and necessitating closer monitoring of international normalized ratio (INR) levels.
D. Opioids: Phenobarbital can increase the metabolism of opioids, leading to reduced analgesic effects and potentially causing inadequate pain control.
E. Diuretics: Phenobarbital can accelerate the metabolism of diuretics, potentially reducing their efficacy and necessitating adjustments in dosage or monitoring of electrolyte levels.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Diarrhea is not typically associated with ergotamine toxicity. Gastrointestinal symptoms such as nausea and vomiting are more common adverse effects of ergotamine use.
B. Delirium is a potential sign of ergotamine toxicity. At toxic levels, ergotamine can cause central nervous system symptoms such as confusion, hallucinations, and delirium.
C. Hypotension may occur as an adverse effect of ergotamine due to its vasoconstrictive properties. However, hypotension alone may not indicate ergotamine toxicity.
D. Bradycardia is not a typical adverse effect of ergotamine. Ergotamine is more commonly associated with vasoconstriction and can lead to hypertension or tachycardia rather than bradycardia.
A. Diarrhea is not typically associated with ergotamine toxicity. Gastrointestinal symptoms such as nausea and vomiting are more common adverse effects of ergotamine use.
B. Delirium is a potential sign of ergotamine toxicity. At toxic levels, ergotamine can cause central nervous system symptoms such as confusion, hallucinations, and delirium.
C. Hypotension may occur as an adverse effect of ergotamine due to its vasoconstrictive properties. However, hypotension alone may not indicate ergotamine toxicity.
D. Bradycardia is not a typical adverse effect of ergotamine. Ergotamine is more commonly associated with vasoconstriction and can lead to hypertension or tachycardia rather than bradycardia.
Correct Answer is B
Explanation
A. Bupropion is primarily used as an antidepressant and smoking cessation aid. It is not typically used for opioid withdrawal.
B. Methadone is a synthetic opioid agonist commonly used in the management of opioid withdrawal. It helps to alleviate withdrawal symptoms and can be used as part of a long-term maintenance program for opioid dependence.
C. Disulfiram is used in the treatment of alcohol dependence by creating unpleasant effects when alcohol is consumed. It is not indicated for opioid withdrawal.
D. Phenobarbital is a barbiturate with sedative and anticonvulsant properties. While it can be used to manage certain withdrawal symptoms, such as seizures associated with alcohol withdrawal, it is not typically used as a first-line treatment for opioid withdrawal.
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