NU 674 Unit 3 comorbidity sequencing plan example

One Plan for Two Problems: Sequencing Treatment for Schizophrenia and Cannabis Use Disorder Without Making Either Wait for the Other

Student Name

Department of Nursing, Herzing University

NU 674: Psychiatric Mental Healthcare II

Instructor Name

February 5, 2026

One Plan for Two Problems: Sequencing Treatment for Schizophrenia and Cannabis Use Disorder Without Making Either Wait for the Other

The Patient, Described Twice

Through the psychiatric lens: Mr. W., a composite patient, has had schizophrenia for sixteen years and left the hospital two weeks ago; both of his admissions in the last year and a half came after he stopped his antipsychotic. He is currently restarting oral risperidone with daily support from his full service partnership team, living on a friend's couch while applying for supported housing, and has mild residual suspiciousness but no active hallucinations.

Through the substance use lens: Mr. W. has used cannabis most days since age 17. He currently smokes high-potency cannabis three to five times a day, more since losing his housing, and meets criteria for moderate cannabis use disorder: he uses more than intended, has tried to cut down without success, spends much of his limited income on it, and continues despite his mother's objections and his team's concerns. He describes cannabis as the only thing that helps him sleep and "quiets things down."

Where the two accounts contradict each other: Mr. W. says cannabis calms his symptoms; his record shows that heavy use preceded several of his relapses. Both can be true in the short term and over months. He is not wrong that it helps him sleep tonight; the team is not wrong that it raises his risk of relapse over time.

How the Two Interact

In people with psychosis, continued cannabis use after the onset of illness has been linked, across pooled studies, to more relapses and hospital admissions than stopping (Schoeler et al., 2016). In the other direction, psychotic symptoms, sleep problems, boredom, and the stress of homelessness all increase his use. Each problem feeds the other, which is why treating either one alone is unlikely to hold.

The Principle: Integrated, Not Sequential

Older approaches treated the two conditions in separate systems and often required sobriety before psychiatric treatment, or psychiatric stability before substance treatment, leaving people with both conditions shut out of each. Integrated treatment, in which the same team addresses both at once, with motivational approaches and stages of treatment matched to the person's readiness, became the recommended model for adults living with both a severe psychiatric illness and a substance problem (Drake et al., 2001). The evidence that any single psychosocial intervention is superior remains limited (Hunt et al., 2019), which argues for a flexible integrated plan rather than one prescribed program. Within this plan, the order of individual moves still matters, and each is argued below.

The Sequence of Moves

Move 1, now: housing and engagement. Without housing, both treatments are harder: medication is lost or stolen, sleep is poor, and cannabis use rises. His housing application goes first because it serves both problems and because it is what he most wants, which builds engagement for everything else.

Move 2, now, alongside move 1: a tolerable antipsychotic, taken consistently. His longest stable period was on aripiprazole, which he tolerated; the team will offer a return to it. Psychosis is not left untreated while cannabis use continues, because untreated psychosis increases use and relapse risk.

Move 3, from the first week: an open conversation about cannabis, not a demand to stop. Using motivational interviewing, the nurse practitioner explores what cannabis does for him and what it costs him, in his terms (Miller & Rollnick, 2013). He is at the contemplation stage at most, so the goal is not abstinence yet but a shared understanding. Requiring abstinence as a condition of treatment would likely end his engagement.

Move 4, weeks 2 to 6: address the reasons he uses. Sleep is the main one. Aripiprazole is less sedating than some alternatives, so the plan includes sleep hygiene support, attention to his sleeping situation, and, if needed, a short-term non-habit-forming sleep medication. If his sleep improves without cannabis at night, one reason for use is gone.

Move 5, when he is ready: a harm reduction goal chosen by him, such as no use before noon, switching to lower-potency products, or keeping one day a week without use, with his relapse signature, shorter sleep, withdrawal, and suspicion, watched more closely during any increase in use.

Move 6, later: a goal of reducing or stopping, if and when he chooses it, with support from a cannabis-focused group in the partnership program or cognitive behavioral strategies.

Why This Order

Housing and a tolerable antipsychotic come first because they reduce both relapse and the drivers of cannabis use, and because they are what he is willing to do now. The cannabis conversation starts at the same time but at the pace of his readiness, because pressing for abstinence early has repeatedly ended his engagement in the past. Addressing sleep before asking him to cut use removes the strongest reason he gives for using. The order would change if cannabis use were clearly driving an acute relapse now, in which case a more direct approach to reducing use, and closer monitoring, would come forward.

What Mr. W. Said When the Plan Was Discussed

The plan was described to him at his next visit in the order above. He agreed readily to the housing and to trying aripiprazole again, saying it was "the only one that didn't make me fat." On cannabis, he said, "I'm not quitting, so don't ask me to." The nurse practitioner said that quitting was not being asked, and asked what he noticed about his sleep on the nights he smoked more. He said he fell asleep faster but woke up "foggy" and often stayed in bed until noon. When asked whether he would be willing to track how much he used for two weeks, just to see, he agreed, on the condition that the count would not be used "to get me in trouble." That condition was accepted and written into the plan. His willingness to count is a small step, but it is the first time in sixteen years that his cannabis use has been discussed with him as information rather than as a violation.

How Progress Will Be Tracked

For psychosis: attendance, medication taken as agreed, and his relapse signature, reviewed weekly. For cannabis: his own count of daily use, recorded without judgment, and his stated goal, reviewed every two weeks. Because the two are linked, both are reviewed at every contact by the same team members, not handed to separate services.

References

Drake, R. E., Essock, S. M., Shaner, A., Carey, K. B., Minkoff, K., Kola, L., Lynde, D., Osher, F. C., Clark, R. E., & Rickards, L. (2001). Implementing dual diagnosis services for clients with severe mental illness. Psychiatric Services, 52(4), 469-476. https://doi.org/10.1176/appi.ps.52.4.469

Hunt, G. E., Siegfried, N., Morley, K., Brooke-Sumner, C., & Cleary, M. (2019). Psychosocial interventions for people with both severe mental illness and substance misuse. Cochrane Database of Systematic Reviews, (12), Article CD001088. https://doi.org/10.1002/14651858.CD001088.pub4

Miller, W. R., & Rollnick, S. (2013). Motivational interviewing: Helping people change (3rd ed.). Guilford Press.

Schoeler, T., Monk, A., Sami, M. B., Klamerus, E., Foglia, E., Brown, R., Camuri, G., Altamura, A. C., Murray, R., & Bhattacharyya, S. (2016). Continued versus discontinued cannabis use in patients with psychosis: A systematic review and meta-analysis. The Lancet Psychiatry, 3(3), 215-225. https://doi.org/10.1016/S2215-0366(15)00363-6