Serotonin toxicity from a drug added elsewhere reshapes a composite tile setter's depression plan in this Unit 7 write-up for MN667, timeline first and revised orders last. Searches like "mn 667 unit 7 assignment example", "mn667 unit 7 sample" and "mn667 unit 7 example" land here.
A Medication List That Did Not Travel: Serotonin Toxicity in a 39-Year-Old Tile Setter on Venlafaxine
[Student Name]
Purdue University Global
MN667: PMHNP Diagnosis and Management Across the Lifespan III
Unit 7 Assignment
[Instructor Name]
[Date]
Composite patient written as a model document. Doses and times are composite; nothing here is a prescribing instruction.
Part 1: The Original Plan
Five weeks before the event, a composite 39-year-old tile setter began treatment for a first episode of major depressive disorder, moderate. The plan, reproduced unchanged: [venlafaxine extended release] at a [composite dose], increased once at week 3; weekly cognitive behavioral therapy; a follow-up visit at six weeks; PHQ-9 at each contact. By week 5 his PHQ-9 had fallen from 17 to 11, and he had returned to full days at work.
Part 2: Timeline
Day 1, Monday, 4:30 p.m. He strained his lower back lifting a pallet of tile and went to an urgent care clinic near the job site. He was prescribed [tramadol] for pain. He did not mention venlafaxine, and he was not asked about other medicines; he later said he "didn't think a back doctor would care about my depression pill."
Day 1, 7 p.m. First dose of tramadol.
Day 2, Tuesday, 8 p.m. With a cough and cold, he took an over-the-counter cough syrup containing [dextromethorphan], on his wife's advice, and repeated it at bedtime.
Day 3, Wednesday, afternoon. He felt restless and shaky at work and went home early. He took another dose of tramadol and the cough syrup at 6 p.m.
Day 3, 9:15 p.m. His wife noticed that he was sweating through his shirt, his hands were shaking, and both legs were jerking. He was agitated and could not sit still. She called the clinic's after-hours line at 9:40 p.m.
Part 3: The Phone Call
The on-call psychiatric nurse practitioner took the call. His wife reported tremor, heavy sweating, jerking legs and agitation, beginning within a day of adding a cough syrup to tramadol in a man taking venlafaxine. She did not know his temperature. The combination of new serotonergic drugs, rapid onset and jerking with sweating and agitation pointed to serotonin toxicity, and the call ended in referral to the emergency department that night rather than a plan to watch him at home. The reasons were recorded: serotonin toxicity can progress over hours to high fever and muscle rigidity, his temperature was unknown, and a home plan could not monitor either. His wife was told to stop the tramadol and cough syrup, not to give any more doses of anything, and to call 911 if he became confused, very hot or rigid before they reached the hospital. She drove him to the emergency department, arriving at 10:20 p.m.
Part 4: Recognition
In the emergency department he was agitated and sweating, with a heart rate of 118, blood pressure of 148/92 and temperature of 38.1 °C. On examination he had tremor, brisk reflexes and inducible clonus at both ankles, more marked in the legs than the arms. His pupils were dilated. Bowel sounds were active.
The Hunter criteria diagnose serotonin toxicity in a patient who has taken a serotonergic agent when certain findings are present, including inducible clonus with agitation or sweating (Dunkley et al., 2003). He met that rule. The criteria were developed to be simple and accurate for clinicians who are not toxicologists, and in the original study they were more accurate than older criteria. Venlafaxine inhibits serotonin reuptake, and so do tramadol and dextromethorphan, which is why both are named among the opioids that can cause serotonin toxicity (Gillman, 2005); serotonin toxicity often follows the addition of a second or third serotonergic drug (Boyer & Shannon, 2005).
Considered and Rejected
Neuroleptic malignant syndrome: rejected because he takes no dopamine-blocking drug, the onset was rapid rather than over days, and he had clonus and hyperreflexia rather than the slow, rigid presentation of that syndrome.
Anticholinergic toxicity: rejected because he was sweating heavily and his bowel sounds were active, while anticholinergic toxicity causes dry, hot skin and reduced bowel sounds.
Opioid withdrawal: rejected because he had been taking tramadol, not stopping it, and withdrawal does not cause clonus.
Infection: rejected as the main cause because his temperature was only mildly raised, his neurologic signs were typical of serotonin toxicity and his symptoms began with the new drugs. A cold was present, but it did not explain the clonus.
Treatment and Course
The emergency team stopped all serotonergic drugs, gave intravenous fluids and a benzodiazepine for agitation, and monitored his temperature and heart rate. His symptoms eased over the next day, and he was discharged after about 30 hours without needing further treatment. Most cases of serotonin toxicity resolve within about a day of stopping the drugs when treated early (Boyer & Shannon, 2005).
Part 5: How the List Failed to Travel
The interaction arose from a prescription written elsewhere. The urgent care clinician did not have his medication list, and he did not offer it. This write-up does not blame that clinician. The failure was a gap between settings: his venlafaxine was recorded in the psychiatric clinic's chart and his pharmacy's system, but the urgent care clinic used a different pharmacy and had no link to either, and the cough syrup was bought over the counter. Three safeguards might have caught it, and none did: the urgent care intake question about current medicines, a pharmacy interaction check, and a label warning on the cough syrup that he did not read. Each depends on someone having the whole list at the moment of decision. The revised plan therefore puts the list in his wallet and his wife's phone, the two places certain to be present at any future visit, rather than relying only on systems that do not connect.
The Revised Plan
Changes:
[The antidepressant] is resumed after recovery, at [a composite dose], because his depression was responding and venlafaxine was not the cause of the toxicity; the cause was the combination.
His pharmacy adds an alert for tramadol, dextromethorphan, other serotonergic opioids and linezolid.
A letter goes to the urgent care clinic, with his consent, describing the event and asking that his medication list be requested at future visits.
He carries a wallet card listing venlafaxine and the drugs to avoid, and he and his wife know to show it at any clinic or pharmacy.
His back pain is referred to his primary care clinician for a plan that avoids serotonergic opioids.
Kept:
Weekly therapy.
PHQ-9 at each contact.
The six-week follow-up, moved one week later to allow recovery.
References
Boyer, E. W., & Shannon, M. (2005). The serotonin syndrome. New England Journal of Medicine, 352(11), 1112-1120. https://doi.org/10.1056/NEJMra041867
Dunkley, E. J. C., Isbister, G. K., Sibbritt, D., Dawson, A. H., & Whyte, I. M. (2003). The Hunter Serotonin Toxicity Criteria: Simple and accurate diagnostic decision rules for serotonin toxicity. QJM, 96(9), 635-642. https://doi.org/10.1093/qjmed/hcg109
Gillman, P. K. (2005). Monoamine oxidase inhibitors, opioid analgesics and serotonin toxicity. British Journal of Anaesthesia, 95(4), 434-441. https://doi.org/10.1093/bja/aei210
How this MN667 Unit 7 example is structured
The write-up turns on the moment the plan stopped fitting, so the original plan is preserved exactly and every later change is marked against it. The telephone decision is documented with its reasoning: symptoms reported, the syndrome suspected, and why a same-day emergency evaluation rather than observation at home. Diagnostic reasoning is shown, not asserted; each rejected alternative gets the finding that argues against it, sweating against anticholinergic toxicity and a rapid onset with no dopamine blocker against neuroleptic malignant syndrome. Responsibility is traced honestly. The interaction arose from a prescription written elsewhere, and the write-up records how the medication list failed to travel, without blaming the urgent care clinician. The revised plan lists the changes and the parts kept: resumption of [the antidepressant] after recovery, a pharmacy alert, a letter to urgent care and a wallet card he now carries.
Get an MN667 Unit 7 example written to your instructions
Complex presentation prompts in MN667 Unit 7 usually add the complication after a plan exists. Send both, the original plan and the development, with the case and rubric. A free first write-up arrives in 24-48h with that plan preserved, the change timed, alternatives rejected with a finding each and the revised orders dated. The paper above is an original model document written by our desk, not a submitted student paper and not an official Purdue University Global document.
MN667 Unit 7 questions, answered
Should the write-up keep the original plan even though it changed?
Yes, reproduced as it was. A reader needs to see what was in place to judge the response, and preserving the plan shows whether it was reasonable on the day it was written. Mark every later change against it and give its reason; the write-up then reads as a record of decisions rather than a fresh plan written with hindsight.
How should a write-up handle an error made by another clinician?
Describe what happened factually and treat it as a system problem where the evidence supports that, such as a medication list that never reached another setting. Avoid assigning blame. Then show what was done to prevent a repeat. Instructors credit professionalism here, and a write-up that closes the gap is stronger than one that only identifies it.
Can a coursework write-up describe emergency management?
It can describe the decision to refer and what the emergency team found, in general terms. Detailed emergency treatment belongs to the clinicians who delivered it and to their protocols, so keep any specifics bracketed and attributed. The write-up's own contribution is recognizing the problem, acting at the right speed and rebuilding the outpatient plan afterward.