| Course | NR 565 Advanced Pharmacology Fundamentals |
|---|---|
| Week | 1 |
| Paper type | Discussion post with two replies |
| Length | About 570 words |
| Format | Discussion post with APA 7 citations |
| School | Chamberlain University |
| Program | MSN, nurse practitioner core |
| Updated | October 2026 |
Free sample paper for NR 565 Week 1
Week 1 Discussion: Initial Post
A Creatinine Clearance of 34 and a Painful Shingles Scar: How One Number Rewrites a Gabapentin Order for a 78-Year-Old
Initial Post
This week's case comes from the rural clinic where I precept and is a composite: a 78-year-old retired school bus driver, about 62 kg, with postherpetic neuralgia along the left T6 dermatome four months after shingles. The pain is burning, worse at night and bad enough that the patient has stopped attending church. Serum creatinine is 1.4 mg/dL, which by the Cockcroft-Gault equation gives an estimated creatinine clearance of about 34 mL/min.
That number matters because gabapentin is not metabolized at all. It is cleared unchanged by the kidneys, so its elimination falls in step with creatinine clearance, and the drug accumulates in a patient whose kidneys clear less. The order that would be written for a younger adult with normal kidneys, building toward 1,800 mg a day in three divided doses, would in this patient produce blood levels well above what that dose was meant to achieve, with sedation, dizziness and falls as the likely result.
So the consequence is concrete. The prescribing information for gabapentin directs a total daily dose of 400 to 1,400 mg, divided twice daily, when creatinine clearance is between 30 and 59 mL/min. I would start at 100 mg at bedtime, increase by 100 mg every three to five days as tolerated, aiming for 300 mg twice daily, and stop titrating at the lowest dose that lets the patient sleep. No loading approach, no three-times-daily schedule, and a ceiling well below the usual one.
The rival I would rule out is amitriptyline, which also has evidence in postherpetic neuralgia (Johnson & Rice, 2014). In a 78-year-old its anticholinergic effects, orthostatic hypotension and sedation make it a drug the Beers Criteria advise avoiding (American Geriatrics Society Beers Criteria Update Expert Panel, 2023). A lidocaine 5% patch is a reasonable addition for the localized area and carries almost no systemic exposure.
Monitoring: dizziness and unsteadiness at each visit for the first month, a fall history, and a repeat creatinine at three months or sooner if the patient becomes ill and dehydrated, since a drop in clearance would mean the dose has to come down again. I would also ask the patient's spouse to watch for confusion in the evenings.
Question for the group: when a renally cleared drug is titrated slowly, how often do you recheck kidney function in an older adult who is otherwise stable?
Reply to Kendra
Kendra, your patient on high-dose propranolol is a good example of first-pass metabolism, and you explained why the oral dose is so much larger than the intravenous one. I would add a second patient to the comparison: someone with cirrhosis and portal shunting, where much of the oral dose bypasses the liver. Would you lower the starting dose in that patient, and how would you know you had lowered it enough? That would turn the first-pass point into a prescribing decision.
Reply to Luis
Luis, I liked your post on a lipophilic drug in an older adult with more body fat. One question: you mention a longer half-life, but the plan stays the same. If the drug stays in tissue longer, would you lengthen the interval before the next dose increase, and would a missed dose matter less? Showing how the half-life changes the titration schedule would complete the argument.
References
American Geriatrics Society Beers Criteria Update Expert Panel. (2023). American Geriatrics Society 2023 updated AGS Beers Criteria for potentially inappropriate medication use in older adults. Journal of the American Geriatrics Society, 71(7), 2052-2081. https://doi.org/10.1111/jgs.18372
Johnson, R. W., & Rice, A. S. C. (2014). Postherpetic neuralgia. New England Journal of Medicine, 371(16), 1526-1533. https://doi.org/10.1056/NEJMcp1403062
The Chamberlain NR 565 Week 1 instructions
The first discussion in this pharmacology course usually asks you to apply a pharmacokinetic principle, such as absorption, distribution, metabolism or elimination, to a real prescribing situation. Expect the prompt to want a patient, a principle, its effect on drug selection or dosing, and replies to peers. Choose one patient and one number, such as a clearance, a weight or a liver finding. State the principle in a sentence and then show how it changes the order you would otherwise write: the dose, the interval, the agent or the need for a loading dose. Rule out one rival drug for a reason in the patient's chart. Add a line on monitoring. In replies, offer a second patient whose details would change the classmate's order again.
Inside the NR 565 Week 1 example
The sample begins with a composite patient: a 78-year-old retired bus driver, 62 kg, four months after shingles, with a creatinine of 1.4 mg/dL and an estimated clearance of about 34 mL/min. One paragraph explains that gabapentin is not metabolized and accumulates when clearance falls. The next gives the consequence as an order: the labeled range for this clearance band, a 100 mg bedtime start, increases every three to five days toward 300 mg twice daily, and no three-times-daily schedule. Amitriptyline is set aside because of anticholinergic and orthostatic effects listed in the Beers Criteria, and a lidocaine patch is offered for the local area. Monitoring covers dizziness, falls and a repeat creatinine. The replies push Kendra toward a cirrhosis patient and Luis toward a titration interval.
Reading the NR 565 Week 1 grading rubric
Discussion points in this week are usually awarded for applying a principle to a patient rather than defining it, for changing the prescription because of that principle, for ruling out an alternative and for replies that extend a peer's thinking. Posts that explain the four processes correctly but never prescribe tend to cluster low, so this sample keeps the definition to one clause. Writing the dose range, starting dose, titration interval and ceiling shows the number changed the order, which is where most credit sits. Ruling out amitriptyline for a reason tied to age shows selection. A monitoring line connected to the same pharmacokinetic fact completes the argument. Replies that add a second patient, rather than agreeing, earn the separate reply points. Citations in APA 7 support the clinical claims.
NR 565 Week 1 help from the desk
The most common loss here is the tutorial post, an accurate summary of pharmacokinetics in which nobody is prescribed anything. A close second is reporting a reduced clearance and then writing the usual dose anyway, which tells the instructor the number was decoration. Some posts drift into mechanisms of disease that belong in pathophysiology. Others make claims about metabolism with no source. Replies that only praise the original post add nothing. Late replies give away points that were easy to keep. Pick one patient, one number and one prescribing change, and spend the post on that change. For a post built around a different drug or organ, send the patient details you want used.
Get a NR 565 Week 1 example written to your instructions
Send the Week 1 prompt as your classroom words it, plus the patient characteristic you want argued from, and a custom example is written to that prompt and returned inside 24 to 48 hours. The first one is free. Whether you post it, borrow its shape or ignore it entirely stays your decision.
More NR 565 papers and MSN samples
- NR 565 Week 2: Drug Class Write-up
- NR 565 Week 3: Prescribing Rationale
- NR 565 Week 4: Case Analysis
- NR 565 Week 5: Sample Paper, in Real Form
- NR 565 Week 6: Patient Education Handout
- NR 565 Week 7: Case Analysis
- NR 565 Week 8: Prescribing Rationale
- NR 545 Week 1: Integration Discussion
- NR 509 Week 1: Health History Write-up
- NR 507 Week 1: Discussion Post
NR 565 Week 1 questions, answered
Does the post need a mechanism explanation?
Only as much as the prescribing sentence needs. Pathophysiology is another course's territory, and a paragraph on enzyme kinetics that never reaches an order reads as material carried in from a different classroom. State the process in whatever clause makes the consequence understandable, then get to the drug, the dose or the interval that changed because of it.
Can I use a patient I have looked after?
In most classrooms yes, provided nothing identifies the person, the employer or the site. Name the type of unit instead of the employer, blur any detail doing no analytical work, and keep hold of the clinical fact you are arguing from. Prescribers who have watched a drug behave oddly in a real body have better material than any invented vignette.
How many sources does a first-week post carry?
Whatever the classroom sets, placed against the claim a reader would challenge. The disputable claim is usually the one tying a patient characteristic to a change in exposure, and that is where a reference earns its keep. A tertiary drug reference supports a dosing statement well, and it does not support the argument that this particular patient is different.
Where can I find a free NR 565 Week 1 sample paper?
Everything above, from the gabapentin order to the reply to Luis, is the NR 565 Week 1 sample in full. A post on another drug or pharmacokinetic principle can be prepared from your own case.
Do I need to calculate creatinine clearance in the NR 565 Week 1 post?
If kidney function drives your argument, yes. Show the estimate and the dosing band it places the patient in, as this sample does with a clearance near 34 mL/min.