| Course | NR 566 Advanced Pharmacology for Care of the Family |
|---|---|
| Week | 3 |
| Paper type | Prescribing rationale |
| Length | About 1,100 words, 5 pages |
| Format | APA 7 student paper |
| School | Chamberlain University |
| Program | MSN, Family Nurse Practitioner (FNP) |
| Updated | October 2026 |
Free sample paper for NR 566 Week 3
Prescribing Rationale: Asymptomatic Bacteriuria at 12 Weeks of Pregnancy in a Patient With G6PD Deficiency, Cephalexin Ordered in Full and Nitrofurantoin Turned Down
Student Name
College of Nursing, Chamberlain University
NR 566: Advanced Pharmacology for Care of the Family
Instructor Name
Month Day, Year
Prescribing Rationale: Asymptomatic Bacteriuria at 12 Weeks of Pregnancy in a Patient With G6PD Deficiency, Cephalexin Ordered in Full and Nitrofurantoin Turned Down
The Constraining Facts
The patient is the composite household's pregnant adult, 29 years old, at 12 weeks by an early ultrasound, in a second pregnancy. At the first prenatal visit, a routine urine culture came back with Escherichia coli above the 100,000 per mL threshold. There is no dysuria, frequency, fever or flank pain. The isolate is susceptible to nitrofurantoin, cephalexin and fosfomycin, and resistant to ampicillin and trimethoprim-sulfamethoxazole. The history includes glucose-6-phosphate dehydrogenase (G6PD) deficiency, found after an episode of hemolysis following a sulfonamide at age 15. The patient also reports a childhood rash with amoxicillin that was never evaluated. Kidney function is normal. The patient works long shifts at a distribution warehouse and has asked for the simplest regimen possible.
These facts set the boundaries. Pregnancy changes the decision about whether to treat at all. G6PD deficiency removes nitrofurantoin. The resistance pattern removes ampicillin and trimethoprim-sulfamethoxazole. The vague childhood rash raises a question about beta-lactams that has to be answered before one is chosen.
A Goal You Can Measure
The goal is a negative test-of-cure culture one to two weeks after treatment, with no progression to symptomatic infection or pyelonephritis during the pregnancy.
Why Treat at All
In most adults, asymptomatic bacteriuria should not be treated. Pregnancy is the main exception. Untreated bacteriuria in pregnancy is associated with pyelonephritis, and treatment reduces that risk; current guidance recommends screening early in pregnancy and treating a positive culture with a course of four to seven days (Nicolle et al., 2019).
Why Not the Other Agents on the Report
The susceptibility report lists two further agents. Ampicillin and amoxicillin are out because the isolate is resistant, and the childhood rash makes them a weaker choice even if it were not. Trimethoprim-sulfamethoxazole is out on two grounds: the isolate is resistant, and the patient has G6PD deficiency with a previous hemolytic reaction to a sulfonamide, which makes the drug unsafe regardless of susceptibility. Fosfomycin remains a genuine fallback. Writing these out matters because a reader should be able to see that every agent on the report was considered and placed, not only the one that was chosen.
Duration and Quantity Explained
Guidance supports four to seven days for bacteriuria in pregnancy (Nicolle et al., 2019). Seven days is chosen because the patient has had one hemolytic event and cannot fall back on nitrofurantoin if this course fails, so a longer course reduces the chance of needing a second agent. Fourteen capsules cover the full course with no refills, so that any recurrence prompts a new culture rather than an automatic repeat.
The Order in Full
Cephalexin 500 mg capsule, one capsule by mouth every 12 hours for 7 days. Dispense 14 capsules. No refills.
Cephalexin is a first-generation cephalosporin with long experience in pregnancy and activity against this isolate. Twice-daily dosing for this indication suits the warehouse shifts. The childhood amoxicillin rash was reviewed in detail: it was a flat, nonitchy rash appearing on the fourth day of a course for an ear infection, with no hives, swelling, breathing difficulty or skin peeling. That history describes a low-risk reaction, and most patients who report a remote penicillin rash tolerate beta-lactams, with serious cross-reaction to a cephalosporin uncommon (Blumenthal et al., 2019). The patient agreed to take the first dose in the clinic and wait 30 minutes.
The Alternative Turned Down: Nitrofurantoin
Nitrofurantoin would ordinarily be a reasonable choice. The isolate is susceptible, the drug concentrates in urine and spares other flora, and at 12 weeks it can be used when there are no suitable alternatives. It is turned down for a fact about this patient: nitrofurantoin can trigger hemolytic anemia in people with G6PD deficiency, and this patient has already had a hemolytic episode with an oxidant drug. The risk is not theoretical here; oxidant drugs are the classic trigger of acute hemolysis in this enzyme deficiency (Cappellini & Fiorelli, 2008). Fosfomycin, as a single 3 g dose, was the other option; it was considered and kept as the fallback if cephalexin cannot be used, because data in pregnancy are more limited and a single dose has a somewhat higher failure rate in some studies.
Monitoring and the Stop Rule
A repeat culture to confirm cure is sent between 7 and 14 days after the course ends. If it is negative, repeat cultures follow at intervals during the pregnancy as the obstetric provider directs. If it remains positive, the susceptibility report guides a second course, and recurrent bacteriuria may lead to suppressive therapy for the rest of the pregnancy.
The stop rule: the patient stops cephalexin and calls the same day for hives, swelling of the lips or tongue, wheezing, a blistering rash or severe diarrhea. If symptoms of pyelonephritis appear, such as fever, flank pain or vomiting, the patient is seen urgently, since that requires evaluation and usually parenteral therapy in pregnancy.
Interactions and Counseling
Cephalexin has no meaningful interaction with the prenatal vitamin. The patient is told: take a capsule at breakfast and another at supper for seven days, even though you feel fine; this infection has no symptoms, but treating it protects your kidneys and your pregnancy; finish the course; and we will check your urine again in two weeks. The patient is reminded to tell every prescriber about the G6PD deficiency, and given a written list of drugs to avoid, including nitrofurantoin and sulfonamides.
When Nothing Is the Answer
If this same culture result had come from the 82-year-old grandparent in the same household, with no symptoms, the right prescription would be nothing. Treating asymptomatic bacteriuria in older adults does not improve outcomes and causes harm, including antibiotic resistance and Clostridioides difficile infection (Nicolle et al., 2019). Writing that sentence matters because it shows that the decision to treat this patient rests on the pregnancy, not on the culture alone.
Documentation and Coordination
The prescription and the G6PD history are entered in the shared prenatal record so the obstetric team sees both. The pharmacist receives a note confirming that the beta-lactam history was reviewed. The test-of-cure order is placed at the same visit so that it is not forgotten when prenatal visits move to the obstetric clinic.
References
Blumenthal, K. G., Peter, J. G., Trubiano, J. A., & Phillips, E. J. (2019). Antibiotic allergy. The Lancet, 393(10167), 183-198. https://doi.org/10.1016/S0140-6736(18)32218-9
Cappellini, M. D., & Fiorelli, G. (2008). Glucose-6-phosphate dehydrogenase deficiency. The Lancet, 371(9606), 64-74. https://doi.org/10.1016/S0140-6736(08)60073-2
Nicolle, L. E., Gupta, K., Bradley, S. F., Colgan, R., DeMuri, G. P., Drekonja, D., Eckert, L. O., Geerlings, S. E., Köves, B., Hooton, T. M., Juthani-Mehta, M., Knight, S. L., Saint, S., Schaeffer, A. J., Trautner, B., Wullt, B., & Siemieniuk, R. (2019). Clinical practice guideline for the management of asymptomatic bacteriuria: 2019 update by the Infectious Diseases Society of America. Clinical Infectious Diseases, 68(10), e83-e110. https://doi.org/10.1093/cid/ciy1121
NR 566 Week 3 instructions, in plain terms
The prescribing rationale usually asks you to select a medication for a specific patient and defend it, including dose, alternatives, monitoring and teaching. Expect the prompt to ask for the full prescription and evidence for your choice. Start with the facts that limit your options: allergies, enzyme deficiencies, pregnancy, kidney function, resistance and the patient's schedule. Set a measurable goal. Write the complete order, including quantity and refills. Reject at least one real alternative for a reason tied to this patient. Give monitoring as a named test with a time, and write a stop rule. Consider whether the right answer for some patients would be no drug at all, and say why this patient is different.
How the NR 566 Week 3 example is put together
The sample presents the pregnant member of the household at 12 weeks with a positive screening culture, no symptoms, G6PD deficiency after a past hemolytic episode and a vague childhood rash with amoxicillin. A short goal and a section on why bacteriuria is treated in pregnancy follow. The order is cephalexin 500 mg every 12 hours for seven days, 14 capsules, no refills, with the rash history assessed and a first dose observed. Nitrofurantoin is rejected because of the hemolysis risk, fosfomycin is kept as the fallback, and ampicillin and trimethoprim-sulfamethoxazole are placed by resistance and G6PD status. Later sections set the culture to confirm cure, the stop rule, counseling, the contrast with the grandparent and documentation in the prenatal record.
Where the points sit in the NR 566 Week 3 rubric
Rationales here are usually assessed on how closely the reasoning touches the patient, whether the order is complete, whether a real alternative is rejected for a patient-specific reason, whether monitoring has a time and a stop rule, and whether the writer recognizes when no drug is right. A paragraph about the drug class that could sit in any paper loses the most, so every decision here is tied to G6PD status, the susceptibility report or the pregnancy. Including quantity and refills shows the order could be sent. Rejecting nitrofurantoin for this patient's hemolysis risk rather than a generic side effect earns substantial credit. A dated culture and a symptom-based stop rule make follow-up concrete. The contrast with the grandparent shows judgment about treating cultures.
NR 566 Week 3 help: mistakes that cost points
The heaviest loss in this paper is a rationale written about a class, with nothing that touches the patient in front of you. Another is defending a drug without ever giving a dose, duration or quantity. Many papers reject an alternative for a side effect the patient does not have, rather than for an interaction, allergy or enzyme deficiency they do have. Some cite a guideline in the opening paragraph and never apply it. Others forget monitoring or leave out a stop rule. Begin with the constraining facts, write the full order and reject alternatives for reasons in the chart. Patients with another infection or history can get their own version once the chart facts are shared.
Get a NR 566 Week 3 example written to your instructions
Send the Week 3 prompt, the case your classroom assigned and the rubric if you have it, and a custom example is written to that exact case and returned inside 24-48h. The first one is free. The agent you defend and the alternative you reject remain your own decisions.
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NR 566 Week 3 questions, answered
Can the defended choice be to prescribe nothing?
Yes, and on some cases it is the better answer. Watchful waiting, a non drug measure, or taking something off an existing list all count as prescribing decisions and are argued the same way, with a goal, a follow up interval and a trigger that would change the plan. What loses points is choosing nothing quietly, without evidence and without a review date attached.
How current does a guideline have to be?
Current enough that a newer version is not sitting in plain sight. Most classrooms ask for recent evidence, commonly the last five years, though a landmark trial older than that is fair when it is what the guideline rests on. Cite the guideline itself rather than a summary of it, and give the year, since that is what a marker checks first.
Should the rationale include patient education?
A few lines usually, unless the rubric asks for more. What matters is that the teaching matches the order: the same interval, the same duration, and the same warning signs that appear in the monitoring section. Education that contradicts the prescription is a common and expensive mismatch, and it is easy for a marker to spot by reading the two side by side.
Where can I find a free NR 566 Week 3 sample paper?
The cephalexin rationale above, written for bacteriuria at 12 weeks in a patient with G6PD deficiency, is the full NR 566 Week 3 sample. Bring your patient's chart facts for one argued around them.
Why is asymptomatic bacteriuria treated in the NR 566 Week 3 case?
Because the patient is pregnant. Untreated bacteriuria in pregnancy raises the risk of kidney infection, while in most other adults, including the grandparent, treatment does more harm than good.