Free Questions and Answers for All Medical Students all over the World
A 77-year-old man presents to the emergency room with a complaint of retention of urine. Carbachol is administered to stimulate bladder emptying. Which of the following is a prominent side effect of carbachol? A-Tachycardia B-Excessive salivation C-Dry skin D-Dilation of the pupils E-Delirium Answer Carbachol is a cholinomimetic drug which activates acetylcholine receptors so, it … Read more
A 62-year-old man presents to the clinic with rashes all over his body and painful joints. Last month, he was diagnosed with arrhythmia. He is taking one medication for it. Laboratory tests reveal anti-histone antibodies. Which of the following drugs is most likely responsible for this condition? A-Hydralazine B-Metoprolol C-Propranolol D-Sotalol E-Verapamil Answer syndr Hydralazine … Read more
A 19-year-old man presents to the clinic with a complaint of tremors and incoordination. Serum transaminases are slightly elevated. Slit lamp examination shows brownish corneal deposits. What is the element directly involved in this condition? A-Arsenic B-Lead C-Copper D-Iron E-Zinc Answer This is a presentation of Wilson’s disease in which cellular copper transport is disturbed … Read more
Workers in the aniline dye industry are more susceptible to bladder cancer than general population. Meanwhile, studies show that animals, when exposed to beta-naphthylamine develop liver cancer but not bladder cancer. What is the most likely explanation of this finding? A-Metabolism of beta-naphthylamine by human cytochrome 450 system in the liver B-Detoxification of beta-naphthylamine by … Read more
A 12-year-old girl visits her physician for follow up after treatment with methotrexate for acute lymphoblastic leukemia. Stool analysis reveals blood in stool. Her platelet count is very low. Which of these substances should be administered immediately? A-Vitamin K B-Leucovorin C-Deferoxamine D-Amitriptyline E-Penicillamine Answer This is a case of methotrexate toxicity. Leucovorin is the active … Read more
A 48-year old man presents to the emergency room with severe headache and blurred vision. His blood pressure is 230/140. Ophthalmologic examination reveals blurred optic discs with indistinct margins. An intravenous drip of nitroprusside is started. What is the mechanism of action of this medication? A- Alpha adrenergic antagonist B- Beta adrenergic antagonist C- Ganglion … Read more