Which drug would be administered daily to suppress the luteinizing hormone surge during controlled ovarian hyperstimulation for in vitro fertilization?

Correct Answer: C

Rationale: Rationale: Leuprolide is a GnRH agonist that suppresses LH surge by desensitizing the pituitary gland. It is administered daily during controlled ovarian hyperstimulation for IVF to prevent premature ovulation. Testosterone, Octreotide, and Cosyntropin do not have the same mechanism of action or purpose in this context.

Correct Answer: C

Rationale: Desmopressin is the most appropriate choice as it is a synthetic form of vasopressin, used to treat diabetes insipidus by reducing excessive urination and thirst. Hydrochlorothiazide (A) is a diuretic that increases urine output. Amiloride (B) is a potassium-sparing diuretic. Carbamazepine (D) is an anticonvulsant, not indicated for this patient's condition.

Correct Answer: B

Rationale: The correct answer is B: Atrial fibrillation. Atrial fibrillation is a common arrhythmia characterized by rapid, irregular heartbeats that can lead to tachycardia. In atrial fibrillation, the atria quiver instead of contracting effectively, leading to an irregular heart rhythm and increased heart rate. This condition can cause tachycardia due to the ineffective pumping of blood by the heart. Incorrect choices: A: Hypertrophic cardiomyopathy - This disorder can cause heart muscle thickening, leading to decreased ventricular filling and potentially causing arrhythmias, but it is not directly associated with tachycardia. C: Mitral regurgitation - This condition can lead to an enlarged left atrium and decreased cardiac output, but tachycardia is not a direct result of mitral regurgitation. D: Mitral stenosis - This condition can cause increased pressure in the left atrium and pulmonary congestion, but t

Correct Answer: D

Rationale: The correct answer is D: Better gastrointestinal absorption. During pregnancy, there are physiological changes that affect drug absorption. Levothyroxine requires careful adjustment because gastrointestinal absorption can be altered, leading to fluctuations in serum levels. Ensuring optimal absorption helps maintain stable thyroid hormone levels for maternal and fetal health. Rationale for why the other choices are incorrect: A: Longer half-life is not the primary reason for dose adjustment during pregnancy, as the concern lies more with absorption changes. B: Less frequent adverse effects do not drive the need for dose adjustment in pregnancy; it is about maintaining stable hormone levels. C: Higher affinity for thyroid receptors is not the primary factor driving dose adjustments; absorption is key to ensuring adequate hormone levels.

Correct Answer: B

Rationale: The correct answer is B: Prednisone. Prednisone is a corticosteroid commonly used to treat inflammatory conditions like autoimmune disorders. It suppresses the immune system, reducing inflammation and alleviating symptoms. The other choices (A, C, D) are unlikely to be the cause of the patient's signs and symptoms as they are not typically used to treat autoimmune disorders or related symptoms. Mifepristone is an abortion pill, fludrocortisone is a mineralocorticoid used for adrenal insufficiency, and methotrexate is a chemotherapy drug or used to treat autoimmune disorders like rheumatoid arthritis, but not typically for the symptoms described.