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
Q- A 24-year-old woman complains of arthralgias and chest pain for 2 years. Chest examination reveals a friction rub and dullness to percussion on the back. A chest x-ray shows bilateral pleural effusions. What is the next step in the patient’s workup? A- Antinuclear antibody test B- CD4 lymphocyte count C- Erythrocyte sedimentation rate D- … Read more
I am Dr Ray Makar, a retired dermatologist and USMLE (United States Medical License Examination) teacher. I am devoting my time and effort to helping medical students and foreign doctors pass USMLE with high scores on the first attempts. I wrote a lot of books, platforms, and online pages containing the most repeated and remembered … Read more