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 A
Explanation
A. Phenylephrine is a decongestant that can raise blood pressure, making it contraindicated for individuals with hypertension. Advising a patient with hypertension to avoid phenylephrine is essential to prevent potential cardiovascular complications.
B. While patients with diabetes should be cautious about certain medications, phenylephrine is not specifically contraindicated in this condition.
C. A 17-year-old female with an upper respiratory infection typically does not have contraindications for phenylephrine unless there are underlying conditions not mentioned.
D. Gout does not have a direct contraindication for phenylephrine use, so the patient may not need to avoid it unless other health issues are present.
Correct Answer is A
Explanation
A. Take the drug on an empty stomach is correct because tetracycline should be taken without food for optimal absorption, ideally 1 hour before or 2 hours after meals.
B. Take the drug along with a meal is incorrect as it can reduce the absorption of tetracycline.
C. Take the drug along with milk or fruit juice is incorrect because calcium and magnesium can bind to tetracycline, decreasing its effectiveness.
D. Take the drug immediately after meals is also incorrect as food can hinder absorption, making this timing ineffective for treatment.