A 23-year-old man who takes anti-mycobacterial therapy for pulmonary tuberculosis presents to the clinic because of recent visual disturbance and pain with movement of his left eye. On examination, there is tenderness to the pressure of the left eye and a blind spot at the center of vision. Fundus examination reveals pale optic disc. What […]
pharmacology
Pharmacology MCQs- 209
A 61-year-old man with a history of recurrent angina and hypertension presents to the clinic for routine examination. His vital signs are within normal limits and his cardiac examination is satisfactory. Reviewing his medication, his physician noticed that he had been prescribed labetalol for 2 years. He discussed with his patient replacing it with atenolol. […]
Pharmacology MCQs- 208
A 24-year-old man with a history of AIDS is currently managed by antiretroviral therapy (HAART) containing a protease-inhibitor, a nucleoside reverse transcriptase inhibitor and a non-nucleoside reverse transcriptase inhibitor. Which one of these drugs is a nucleoside reverse transcriptase inhibitor? A-Etravirine B-Efavirenz C-Indinavir D-Saquinavir E-Zidovudine Answer Zidovudine is the only drug on this list that […]
Pharmacology MCQs- 207
A 32-year-old woman presents with a complaint of severe pain during menstruation. She is prescribed indomethacin. Which is the mechanism of action of this drug to reduce her pain? A-Interferes with the production of leukotrienes B-Limits the production of histamine C-Stimulates the production of prostaglandin E2 D-Inhibits the production of prostaglandin E2 E-Inhibits the production […]
Pharmacology MCQs- 206
A 23-year-old man with a long history of duodenal ulcer has been treated with cimetidine (Tagamet) for 6 months. What is the mechanism of action of this drug? A-Adds a protective membrane to gastric mucosa B-Blocks H2 receptors C-Stimulates H2 receptors D-Inhibits H+,K+-ATPase Answer Cimetidine blocks H2 receptor so, it blocks the secretion of hydrochloric […]
Repeated USMLE Questions Step 1- 276
A 64-year-old man complains of severe headache, dizziness, nausea and deterioration of vision. Workup shows a decrease in oxygen carrying capacity with no change in PO2 of arterial blood. Which of the following is most likely responsible for this patient’s symptoms? A- Ozone B- Carbon monoxide (CO) C- Sulfur dioxide D- Nitrogen Answer This is […]
Pharmacology MCQs- 205
A 9-month- old girl is brought by her grandmother to the clinic for routine examination. She told you that the girl is totally fine but she noticed yellow discoloration of her teeth. The physician asks if her mother took any medications during her pregnancy. She remembers that she was taking an antibiotic for bronchitis. Which […]
Pharmacology MCQs- 204
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 […]
Medical Question of the Day- 34
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 […]
Repeated USMLE Questions Step 1- 268
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 […]