Nokea
Which is not an antithyroid drug?
- A. Mercazolile
- B. Triiodthyronine
- C. Diiodthyrosine
- D. Potassium iodade
Correct Answer: B
Rationale: Triiodothyronine (T3) is a thyroid hormone, not an antithyroid drug, unlike the others which inhibit thyroid function.
You may also like to solve these questions
Pregnant patients who are taking isoniazid (INH) should take 25 mg/day of vitamin B6 (pyridoxine) to prevent:
- A. Beriberi
- B. Peripheral neuropathy
- C. Rickets
- D. Megaloblastic anemia
Correct Answer: B
Rationale: Vitamin B6 supplementation prevents INH-induced peripheral neuropathy.
The 'donut hole' in Medicare Part D:
- A. Will be totally eliminated with the federal health-care reform enacted in 2010
- B. Refers to the period of time when annual individual drug costs are between 250 and 2,250 per year and drug costs are covered 75%
- C. Refers to the period between when the annual individual drug costs are 2,970 and 4,750 and the patient pays 52.5% of the costs of brand name drugs (2013)
- D. Has no effect on whether patients continue to fill their prescriptions during the coverage gap
Correct Answer: C
Rationale: The donut hole (2013) is the coverage gap where patients pay more out-of-pocket.
The volume of distribution (Vd) for a drug that is completely retained in the vascular compartment would be?
- A. High
- B. Low
- C. Unchanged
- D. Cannot be determined
Correct Answer: B
Rationale: A drug confined to the vascular compartment (e.g., plasma) has a low Vd, close to plasma volume (about 0.06 L/kg), indicating limited distribution.
The nurse administers amoxicillin 500 mg. The half-life of this drug is approximately 1 hour. At what point would the drug level in the body be 62.5 mg if the drug was not administered again?
- A. 1 hours after the original dose
- B. 2 hours after the original dose
- C. 3 hours after the original dose
- D. 4 hours after the original dose
Correct Answer: C
Rationale: The half-life of a drug is the time it takes for the amount of drug in the body to decrease to one-half of the peak level it previously achieved. At a dose of 500 mg the drug level would be 250 mg in 1 hour, 125 mg in 2 hours, 62.5 mg in 3 hours, and 31.25 mg in 4 hours so the correct answer is 3 hours.
Thyroxin is contributed in all listed processes except one:
- A. Increase tissue demand of oxygen consumption
- B. Activating protein, carbohydrates and fats metabolism
- C. Increase the main metabolism
- D. Decrease the main metabolism
Correct Answer: D
Rationale: Thyroxine (T4) increases metabolism, not decreases it, by enhancing oxygen use and nutrient breakdown.