A 36-year-old woman in her first trimester of pregnancy is newly diagnosed with hypertension. Her vital signs are:
Blood pressure: 150/90 mmHg
Heart rate: 76 beats/min
Respiratory rate: 18 breaths/min
Which of the following is the safest and most appropriate antihypertensive therapy?
A. Aliskiren
B. Captopril
C. Valsartan
D. Labetalol
A 6-year-old boy is diagnosed with pinworm (Enterobius vermicularis) infection.
Which of the following medications is recommended for treatment?
A. Mefloquine
B. Doxycycline
C. Albendazole
D. Pyrimethamine
The correct answer is C. Albendazole.
Key Clinical Takeaways
First-line treatment: Albendazole (or Mebendazole, or Pyrantel pamoate) is a standard first-line anthelmintic medication used to treat Enterobius vermicularis (pinworm) infections.
Treatment regimen: A single dose is given initially, followed by a second dose 2 weeks later to prevent reinfection from newly hatched eggs, as these medications target adult worms rather than the eggs.
Household management: Because pinworm eggs spread easily via the fecal-oral route and fomites, it is routinely recommended to treat all household members concurrently, along with strict hygiene measures (washing bedding, clipping fingernails).
Why the other options are incorrect:
Mefloquine: An antimalarial medication used for Plasmodium prophylaxis and treatment.
Doxycycline: A tetracycline antibiotic used for bacterial infections and certain vector-borne diseases.
Pyrimethamine: An antiparasitic medication primarily used in combination therapy for toxoplasmosis and malaria.
A pregnant woman who is colonized with group B Streptococcus (GBS) has a documented penicillin allergy with a high risk of anaphylaxis. She presents in labor and requires intrapartum antibiotic prophylaxis.
Which of the following is the recommended antibiotic?
A. Cefazolin
B. Linezolid
C. Penicillin G
D. Clindamycin
The correct answer is D. Clindamycin.
Key Clinical Takeaways:
First-line agents for GBS prophylaxis: Penicillin G (or Ampicillin) is the standard drug of choice for intrapartum Group B Streptococcus prophylaxis in non-allergic women.
Penicillin allergy stratification:
Low risk for anaphylaxis (e.g., non-urticarial maculopapular rash, benign non-IgE reaction): Cefazolin is recommended because cross-reactivity is low and it achieves good amniotic fluid levels.
High risk for anaphylaxis (e.g., history of severe IgE-mediated reactions like anaphylaxis, angioedema, respiratory distress, or urticaria): Penicillin and cephalosporins (including Cefazolin) must be avoided.
High-risk regimen: Clindamycin is recommended if the GBS isolate is confirmed to be susceptible to clindamycin.
Vancomycin is used as an alternative if the GBS isolate shows resistance to clindamycin, if susceptibility testing was not performed, or if the sensitivity results are unknown.
Why the Other Options Are Incorrect
A. Cefazolin: First-line for patients with a penicillin allergy who have a low risk of anaphylaxis. It is avoided here due to potential severe IgE-mediated cross-reactivity in high-risk patients.
B. Linezolid: Not a standard or recommended agent for GBS prophylaxis.
C. Penicillin G: Strictly contraindicated due to the documented history of severe penicillin anaphylaxis.
Which of the following section of a research paper describes the aims and objectives?
A. Method
B. Discussion
C. Introduction
D. Date analysis
The correct answer is C. Introduction.
Key Clinical & Academic Takeaways
Introduction Section: The introduction sets the context for the research paper. It typically follows an "inverted pyramid" structure—starting with broad background information, identifying the specific gap in existing knowledge, and concluding with the study's precise aims, research questions, or hypotheses.
The Introduction provides the background and rationale for the study and typically states the research aim, objectives, and/or research question.
Functions of Other Sections:
A. Method: Outlines the study design, participant selection, data collection procedures, materials, and step-by-step experimental protocols.
B. Discussion: Interprets the findings, contextualizes them within existing literature, addresses study limitations, and outlines clinical or practical implications.
D. Data Analysis: Describes the statistical tests, software, and analytical models used to evaluate the data (often presented as a sub-section of the Method section).
A 65-year-old man was diagnosed with type 2 diabetes five year ago, maintained on metformin. Which of the following need to be monitored?
A. Vitamin C level
B. Vitamin D level
C. Vitamin B1 level
D. Vitamin B12 level
The correct answer is D. Vitamin B12 level.
Key Clinical Takeaways
Metformin-Induced B12 Deficiency: Long-term metformin use (typically ≥2-5 years or at higher doses) is associated with an increased risk of Vitamin B12 deficiency, occurring in up to 10–30% of patients.
Mechanism: Metformin interferes with the calcium-dependent absorption of the Vitamin B12–intrinsic factor complex in the terminal ileum.
Monitoring & Complications: Major clinical guidelines (such as the American Diabetes Association) recommend periodic monitoring of serum B12 levels in long-term metformin users. Unmonitored deficiency can lead to: Megaloblastic anemia & Peripheral neuropathy (which can be easily misdiagnosed as diabetic peripheral neuropathy)
Treatment: B12 deficiency can be prevented or treated with oral or intramuscular B12 supplementation, and calcium supplementation can also help restore absorption.
Why the Other Options Are Incorrect
A, B, & C (Vitamins C, D, B1): Metformin does not significantly impair the absorption or metabolism of Vitamins C, D, or B1 (Thiamine), so routine monitoring of these levels is not indicated solely due to metformin therapy.
Which of the following insulins has the longest duration of action?
A. Aspart
B. Detemir
C. Glargine
D. Degludec
The correct answer is D. Degludec.
Insulin Duration Comparison
Degludec (Ultra-long-acting): Has a duration of action exceeding 42 hours (half-life of ~25 hours). It forms multi-hexamers upon subcutaneous injection, creating a soluble depot that slowly releases insulin monomers into the circulation.
Glargine (Long-acting): Has a duration of action of approximately 20–24 hours (U-100 formulation).
Detemir (Long-acting): Has a duration of action of approximately 12–24 hours depending on the dose (binds to albumin in subcutaneous tissue and circulation).
Aspart (Rapid-acting): Has a rapid onset (10–20 minutes) and a brief duration of action of 3–5 hours.
Which of the following contraceptive methods also helps reduce the risk of transmission of sexually transmitted infections (STIs)?
A. Spermicide
B. Oral contraceptive
C. Intrauterine device
D. Male latex condom
The correct answer is D. Male latex condom.
Key Clinical Takeaways
Barrier Protection: The male latex condom (along with female condoms) acts as a physical barrier that prevents direct contact with genital secretions and skin lesions, making it the most effective contraceptive method for reducing the transmission of sexually transmitted infections (STIs), including HIV, gonorrhea, chlamydia, and trichomoniasis.
Why the Other Options Do Not Protect Against STIs:
A. Spermicide: Spermicides (such as Nonoxynol-9) do not protect against STIs. Frequent use can cause mucosal irritation and micro-trauma in the vagina or rectum, which can actually increase the risk of acquiring HIV and other infections.
B. Oral Contraceptive: Hormonal birth control pills regulate hormones to prevent ovulation and pregnancy, but offer no barrier protection against bacterial or viral sexually transmitted pathogens.
C. Intrauterine Device (IUD): IUDs provide highly effective long-term contraception within the uterus, but they offer no protection against lower genital tract STIs. In fact, insertion of an IUD during an active, untreated STI can increase the risk of pelvic inflammatory disease (PID).
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