What is the major reason that monoamine oxidase inhibitors (MAOIs) are rarely used in clinical practice today?
They are under a scheduled drug classification.
They are ineffective in treating depression or anxiety disorders.
They can cause gastrointestinal (GI) bleeding and esophageal varices.
They may cause dangerous interactions with some foods and drugs.
The Correct Answer is D
A. While MAOIs may have some regulatory considerations, they are not classified under a scheduled drug classification like controlled substances.
B. MAOIs are effective in treating depression and anxiety disorders, which is not the reason for their limited use.
C. Although MAOIs can have some side effects, they are more notably associated with dietary and drug interactions rather than causing GI bleeding or esophageal varices.
D. MAOIs can cause dangerous interactions with foods that contain tyramine (like aged cheeses and fermented products) and certain medications, leading to hypertensive crises, making their use cautious and limiting in clinical practice.
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Correct Answer is B
Explanation
A. Increasing fluid intake may not alleviate the cramping and diarrhea, which are common side effects of magnesium citrate.
B. Abdominal cramping and diarrhea are expected side effects of magnesium citrate, and the patient can continue the medication unless symptoms become severe.
C. Discontinuing the medication should not be recommended unless the side effects are intolerable or the patient experiences severe reactions.
D. Switching to a different type of laxative is unnecessary unless the patient has contraindications to magnesium citrate or develops severe side effects.
Correct Answer is B
Explanation
A. A drug that binds tightly to protein is typically released slowly, not quickly, as it remains bound in circulation.
B. Tight binding to proteins usually results in a prolonged duration of action since the drug is released gradually into the bloodstream, leading to sustained therapeutic effects.
C. Drugs that bind tightly to protein are generally not excreted quickly; they remain in circulation longer due to the binding.
D. While toxicity can occur with any drug, tight protein binding does not inherently lead to toxicity; it primarily affects the pharmacokinetics of the drug.