Q- A 70-year-old patient with atrial fibrillation is prescribed digoxin. Which of the following findings suggests toxicity? A- Bradycardia and yellow vision B- Diarrhea and flushing C- Muscle twitching and dry mouth D- Tremor and hyperthermia Q- A 30-year-old man develops flushing after taking niacin for hyperlipidemia. What mechanism causes this side effect? A- … Read more
Q- A 35-year-old woman presents with weight gain, fatigue, and constipation. She is diagnosed with hypothyroidism and started on levothyroxine. Which of the following mechanisms best describes the action of this drug? A- Blocks TSH secretion B- Inhibits thyroid peroxidase C- Replaces deficient thyroid hormone D- Stimulates iodine uptake Q- Which of the following … Read more
Q- A 45-year-old man with hypertension and benign prostatic hyperplasia (BPH) is started on a new medication that improves urinary symptoms but causes dizziness when standing. Which of the following drugs is most likely responsible? A- Atenolol B- Furosemide C- Prazosin D- Enalapril Q- A 25-year-old man with a history of seizures is taking … Read more
Q- A 6-year-old boy with acute lymphoblastic leukemia develops cardiotoxicity after chemotherapy. Which drug is most likely responsible? A- Cyclophosphamide B- Doxorubicin C- Methotrexate D- Vincristine Q- A patient with asthma is given a new drug that causes tremor and palpitations but improves her symptoms. Which receptor is this drug most likely acting on? … Read more
Q- Which one of the following conditions is characterized by the flattening of intestinal villi? A- Celiac disease B- Crohn’s disease C- Duodenal ulcer D- Ulcerative colitis Q- Anti-mitochondrial antibodies are most likely found in patients with which one of the following conditions? A- Gastric ulcer B- Primary biliary cirrhosis C- Rheumatic fever D- Viral … Read more
Q- Which of the following is the main action of the pseudocholinesterase enzyme? A- Blockage of the secretion of acetylcholine B- Breakdown of acetylcholine at synaptic junctions C- Competitive inhibition of acetylcholinesterase D- Metabolism and detoxification of certain drugs Q- Genetic polymorphism is characterized by delayed metabolism of drugs by acetylation. Which one of … Read more