pharmacology

Q- A 55-year-old man with atrial fibrillation is taking warfarin. He is started on trimethoprim-sulfamethoxazole for a urinary tract infection. What is the most likely outcome of this drug interaction? A- Decreased anticoagulant effect B- Enhanced metabolism of warfarin C- Increased risk of bleeding D- No significant effect   Q- A 35-year-old woman with generalized … Read more

Q- A 60-year-old man with atrial fibrillation is started on amiodarone. Which adverse effect is most commonly associated with this medication? A- Hyperkalemia B- Hypoglycemia C- Nephrotoxicity D- Pulmonary fibrosis   Q- A 28-year-old woman develops a dry cough after beginning treatment for hypertension. Which drug is most likely responsible? A- Amlodipine B- Lisinopril C- … Read more

Q- A 60-year-old patient with chronic heart failure is started on digoxin. Which electrolyte imbalance increases the risk of digoxin toxicity? A- Hyperkalemia B- Hypocalcemia C- Hypokalemia D- Hyponatremia   Q- Which of the following drugs inhibits bacterial folate synthesis by blocking dihydropteroate synthase? A- Ciprofloxacin B- Isoniazid C- Trimethoprim D- Sulfamethoxazole   Q- A … Read more

Q- Which of the following drugs is a reversible cholinesterase inhibitor used in the management of myasthenia gravis? A- Atropine B- Neostigmine C- Pralidoxime D- Succinylcholine   Q- A patient with atrial fibrillation is prescribed warfarin. Which of the following factors will increase the anticoagulant effect of warfarin? A- Vitamin K deficiency B- Rifampin therapy … Read more

Q- A 25-year-old man is treated with chloramphenicol for typhoid fever. He later develops pallor, fatigue, and pancytopenia. Which adverse effect best explains this presentation? A- Dose-dependent reversible anemia B- Folate deficiency C- Irreversible aplastic anemia D- Vitamin B12 deficiency   Q- A 60-year-old woman with hypertension is prescribed hydralazine. Which adverse effect is most … Read more