Final answer:
The nurse should administer four 250 mg tablets of azithromycin to reach the prescribed 1 gram dosage.
Step-by-step explanation:
The student question is concerning the administration of azithromycin to a pregnant woman at 16 weeks of gestation with a positive chlamydia culture. The prescription states to administer 1 gram of azithromycin orally. Since each tablet contains 250 mg of azithromycin, the nurse would need to administer four tablets to reach the prescribed 1 gram dosage. This is calculated by dividing the total milligrams needed (1000 mg in 1 gram) by the milligrams per tablet (250 mg per tablet).