07/30/2026
THE UBC PHARMACISTS CLINIC: Independent Review of Complex Medication Regimens and Unresolved Adverse Effects
When a person’s health, behaviour or ability to function changes during long-term treatment, an essential question may remain unanswered: is the underlying condition worsening, or is the medication contributing to the decline?
Sedation, cognitive impairment, emotional blunting, severe restlessness, disturbed sleep, s*xual dysfunction and loss of initiative may emerge during psychiatric treatment. Medication-related problems also arise with immunosuppressants, corticosteroids, cardiovascular medicines, pain treatments and other long-term regimens, particularly when several drugs interact, organ function changes or laboratory monitoring is required.
These cases become difficult when treatment has accumulated across several practitioners. A family physician may continue a prescription initiated by a specialist. A hospital admission may introduce several changes at once. Additional drugs may then be prescribed for sleep, pain, nausea, movement problems or cardiovascular symptoms. Each practitioner sees one part of the treatment, while no one examines what the complete regimen is doing.
The medical record may document every prescribing decision without revealing their cumulative effect. The patient may know that a marked change followed a new medication, a higher dose or an attempted reduction. Family members may see a decline that is difficult to communicate during a brief appointment.
The UBC Pharmacists Clinic offers another clinical route. Patients and families anywhere in Canada may contact the clinic directly for an independent medication review. A physician’s or nurse practitioner’s referral is not required. The clinic welcomes self-referrals from people with Canadian addresses, with preference given to residents of British Columbia.
The clinic is a publicly funded, not-for-profit service, and most services are provided without charge.
Its clinical pharmacists examine the complete regimen rather than treating each prescription as an isolated decision. Their role is to help determine whether every medication remains necessary, effective, safe and well tolerated.[1]
🌿 What a Comprehensive Medication Review Examines
A comprehensive review begins with what the person actually takes.
The pharmacist examines why each medication was prescribed, whether it produced the intended benefit and what changed after it was started, increased, reduced or stopped. The assessment may also consider laboratory and physical monitoring, adverse effects, withdrawal, interactions, prescribing across several services and the combined burden of the regimen.
A review may identify:
• a medication that no longer has a clear current purpose;
• an unsuitable dose, formulation or dosing schedule;
• inadequate laboratory or physical monitoring;
• duplicate or interacting treatments;
• several drugs producing overlapping sedation or cognitive impairment;
• an adverse effect that has been attributed to illness;
• withdrawal that has been interpreted as recurrence;
• a temporary hospital prescription that has continued without reassessment;
• one medication being used to manage an effect caused by another; or
• a regimen whose combined burden now exceeds its demonstrated benefit.
The pharmacist can document the findings, prepare an evidence-based care plan, recommend specific changes and provide follow-up as the treatment is reviewed.
Consultation notes, laboratory findings and treatment recommendations may be shared within the patient’s circle of care. The assessment can therefore reach the family physician, psychiatrist, relevant specialists, community pharmacist and other practitioners responsible for the regimen. The clinic also works with pharmacists in community and hospital practice to develop and implement care plans for complex patients.[2]
A concern first noticed by the patient or family can become a documented clinical finding that informs subsequent treatment decisions.
🌿 When Medication Changes the Clinical Picture
Psychiatric medications can alter many of the same functions used to assess psychiatric illness.
Sleep, concentration, energy, movement, motivation, emotional responsiveness, s*xual function, perception and behaviour all contribute to psychiatric diagnosis. They can also change after medication is introduced or altered.
Medication-induced restlessness may be interpreted as anxiety or worsening agitation. Sedation may reduce visible distress while impairing thought and ordinary functioning. Emotional blunting may be recorded as continuing depression. Cognitive slowing may be attributed to age, illness or lack of motivation. Activation and insomnia following a medication change may lead to another diagnosis and another prescription.
Akathisia provides a clear example. The United Kingdom’s Medicines and Healthcare products Regulatory Agency describes it as a distressing subjective state of restlessness that can be mistaken for psychomotor agitation. It commonly appears shortly after an antipsychotic is started or its dose is increased.
The distinction directly affects treatment. Psychiatric agitation may prompt a higher dose, while akathisia may require the dose to be reduced.[3]
Chronology is therefore the foundation of causal analysis.
Did the problem begin after a medication was introduced? Did it follow an increase, reduction or missed dose? Did several treatments change during a hospital admission? Was another prescription added to manage the new difficulty? Did the problem lessen when the dose was reduced or the medication was changed?
Without that sequence, neither the diagnosis nor the medication can be assessed credibly.
When a drug effect is mistaken for a new disorder, another medication may be prescribed while the role of the original treatment disappears from view. A prescribing cascade develops. The record then appears to show an increasingly complicated illness requiring increasingly complicated treatment.
It may instead show a medication problem that has never been fully investigated.
The same scrutiny is required when someone is described as treatment-resistant.
“Treatment-resistant” describes what happened after treatment. It does not explain why improvement failed to occur.
Adverse effects, interactions, withdrawal, an unsuitable dose, an uncertain diagnosis or the combined burden of several medications may all contribute to an apparent failure of treatment. Adding further treatment before establishing what the existing drugs are already doing can make the original problem more difficult to identify.
Treatment outcomes must also be judged more broadly than the symptom for which a drug was prescribed. A person may appear calmer while losing concentration, initiative, emotional range, s*xuality, physical vitality or the ability to work and sustain relationships.
The purpose of treatment is to improve the person’s life, not simply to make distress less visible.
🌿 Withdrawal and Failed Attempts to Stop
Medication care is often organised more effectively around beginning treatment than around ending it.
A drug may have been prescribed during a crisis, a hospital admission or a short appointment. Months or years later, the person may want to stop but have no workable plan. Previous attempts may have produced severe symptoms, followed by reinstatement, a higher dose or another medication.
“Reduce gradually” is not a complete tapering plan.
A workable reduction depends upon the particular drug, length of treatment, present dose, previous withdrawal reactions, other medications, available formulations and the person’s response as the reduction proceeds.
The same numerical decrease can have a different effect at different stages. A reduction tolerated at a higher dose may become much more difficult near the end because it represents a larger proportion of the remaining dose.
The Maudsley Deprescribing Guidelines, published in 2024 by Mark Horowitz and David Taylor, provide practical guidance on reducing antidepressants, benzodiazepines, gabapentinoids and Z-drugs. Its methods include reductions that become progressively smaller as the dose falls. The guide offers a developed clinical reference for examining a failed taper and planning reductions around the pharmacology of the particular medication.[4]
No single reduction formula determines what every patient will tolerate. The plan must remain individualised and responsive to what occurs.
Pharmacists are particularly well placed to examine the practical elements of reduction, including dose strengths, liquid preparations, dosing schedules, interactions and the means of producing smaller changes.
🍃 Benzodiazepines
Physical dependence is a physiological adaptation to repeated exposure and is distinct from addiction.
The 2025 multidisciplinary guideline led by the American Society of Addiction Medicine states that almost everyone who takes benzodiazepines regularly for more than a month will become physically dependent, even when the medication is taken as prescribed. ASAM advises against abrupt discontinuation after regular use and recommends a gradual, individualised taper under clinical supervision.[5]
Anxiety, insomnia, agitation, cognitive disturbance and sensory or perceptual symptoms appearing after a reduction must therefore be examined in relation to the dose, duration of use, rate of reduction and timing of the deterioration.
Withdrawal can otherwise be mistaken for proof that the original condition has worsened.
🍃 Antidepressants
Antidepressant withdrawal may include anxiety, low mood, insomnia, panic, irritability, dizziness, nausea, disequilibrium, altered sensations, cognitive difficulty and severe restlessness.
Several of these resemble the conditions for which antidepressants are prescribed. Symptom similarity alone does not establish relapse.
NICE states that antidepressants should be reduced in stages, with monitoring during the reduction and further changes delayed until withdrawal symptoms have resolved or become tolerable. Its wider withdrawal guidance recommends slow, stepwise reductions proportionate to the existing dose, so that the reductions become smaller as the dose falls. NICE also states that relapse does not usually occur immediately after an antidepressant is reduced or stopped.[6]
When withdrawal is recorded as recurrence, the medication may be reinstated, increased or supplemented. The record then appears to show that the person deteriorates whenever treatment is withdrawn and therefore requires the drug indefinitely.
A physiological response to reduction has become diagnostic evidence.
🍃 Antipsychotics
The MHRA recognises that abrupt discontinuation after prolonged antipsychotic use can produce physical withdrawal effects, including insomnia, anxiety, restlessness, sensory symptoms and movement disorders.
It advises clinicians to examine the temporal relationship between symptoms and the dose reduction and states that long-term treatment should be withdrawn gradually and closely monitored.[7]
Withdrawal, withdrawal-related destabilisation and recurrence may overlap. That complexity requires careful chronology, measured dose changes and close monitoring.
Difficulty stopping a medication does not establish that it must continue. It may reveal physical dependence, an unsuitable reduction or the absence of a workable plan.
🌿 Reconstructing the Complete Regimen
Complex regimens rarely originate with one practitioner.
A family physician may prescribe an antidepressant. A psychiatrist may add a benzodiazepine or antipsychotic. A hospital team may alter several medications during an admission. Another specialist may introduce treatment for pain, sleep, nausea, movement problems, inflammation or cardiovascular symptoms.
The same pattern occurs outside psychiatric care. Immunosuppressants, corticosteroids and other potent long-term treatments may require continuing laboratory surveillance, dose adjustment and reassessment as health conditions and other medications change.
A comprehensive review can identify where one practitioner is treating an effect caused by another prescription, where duplicate or interacting treatments have accumulated, where a hospital medication has continued without reassessment or where no single practitioner has considered the combined burden of the regimen.
The formal medication list may itself be incomplete. It may omit over-the-counter medicines, antihistamines, sleep products, vitamins, herbal preparations, supplements, intermittently used drugs or treatments that were recently stopped. Hospital and community records may conflict. The directions on the label may differ from the person’s actual use.
For each medication, the pharmacist can examine:
• why it was prescribed;
• what benefit was expected;
• whether that benefit occurred;
• what changed after treatment began; and
• what happened during later increases, reductions, missed doses or attempts to stop.
The medication list shows what the person takes.
The chronology shows what the treatment has done.
The patient’s account is indispensable. A person may report that a new state appeared shortly after an increase, lessened after a missed dose, returned after reinstatement or bore little resemblance to the difficulties that originally led to treatment.
Family members may hold the only continuous account of changes in cognition, emotional range, movement, sleep, appetite and ordinary functioning. The clinic welcomes self-referrals from family members, and a patient may invite a family member to participate in an appointment. A spouse may know that emotional responsiveness disappeared after a dose increase. An adult child may see a marked decline after hospital discharge while each practitioner sees only one part of the regimen.
Professional expertise tests those observations against pharmacology, chronology, laboratory information and alternative explanations. It does not replace them.
The clinic’s access to CareConnect allows its pharmacists to consult laboratory information and hospital records when assessing the safety and effectiveness of treatment. This is particularly valuable after discharge, when several prescriptions may have been introduced, discontinued or altered within a short period.[8]
Medication reconciliation establishes what changed.
Comprehensive medication management asks whether the resulting regimen still makes sense.
The medical record is evidence, not a verdict.
Where the chronology conflicts with the explanation recorded in the chart, the pharmacist can document the discrepancy and recommend that the medication, the diagnosis or both be reconsidered.
🌿 What the Clinic Can Change
British Columbia pharmacists may adapt qualifying prescriptions. Depending upon the prescription and the clinical circumstances, an adaptation may change the dose, formulation or regimen, renew treatment for continuity of care or make an appropriate therapeutic substitution. More than one modification can be made in a single adaptation when the pharmacist considers it clinically appropriate.[9]
A reduction may require a smaller strength, a liquid formulation or a revised dosing schedule. Where direct adaptation is available, the pharmacist may be able to make that change.
Where another prescriber must authorise it, the clinic can provide a written assessment identifying the drug-therapy problem, the recommended change and the clinical reasoning supporting it.
UBC expressly identifies people who want to take fewer medications and patients who may need to start or stop drug therapy as appropriate for its service. The clinic can examine the medication history, earlier withdrawal reactions, available formulations, interactions and practical obstacles to reduction, then work with the care team as a plan is developed and followed.
The clinic provides consultation rather than routine prescription filling or urgent medical care. Its recommendations must sometimes be implemented by another practitioner responsible for the treatment.
🌿 Who May Benefit
UBC recommends an initial appointment for people with multiple or complex health conditions, medication questions requiring more time, medication problems such as side effects or sensitivities, difficulty managing medications at home, a wish to take fewer medications or recent discharge from hospital.
Healthcare professionals also refer patients with polypharmacy, adverse drug events, reduced kidney or liver function, frailty, poor treatment outcomes or a need to start or stop drug therapy.[10]
A review may be particularly useful when a person:
• takes several psychiatric or other long-term medications;
• receives prescriptions from several practitioners;
• deteriorated after a drug was started, increased, reduced or stopped;
• has adverse effects that remain unexplained;
• has had withdrawal interpreted as recurrence;
• wants to take fewer medications but lacks a workable plan;
• has been unable to reduce a benzodiazepine, antidepressant or antipsychotic safely;
• has recently returned from hospital with a substantially changed regimen;
• has reduced kidney or liver function; or
• needs a formal medication assessment that can be shared across the care team.
🌿 Preparing for an Appointment
The UBC Pharmacists Clinic is located in Room 2301 of the Pharmaceutical Sciences Building at 2405 Wesbrook Mall in Vancouver.
Appointments are available Monday through Thursday, from 9:00 a.m. to 4:00 p.m., in person, by telephone or by secure video conference. The telephone number is 604-827-2584.[11]
Patients should prepare a list of all current prescription and non-prescription medications, including doses, together with medications previously tried. British Columbia residents who do not remember earlier prescriptions may be able to retrieve much of this information through the Health Gateway app.
Useful information includes:
• approximate medication starting dates and dose changes;
• perceived benefits and adverse effects;
• previous missed doses or attempts to reduce treatment;
• details of earlier withdrawal reactions;
• hospital discharge information;
• observations from family members about changes in behaviour or function; and
• the names of the prescribers and pharmacies involved.
Anyone seeking help with a reduction should bring details of previous attempts, including the original dose, the size of each reduction, how long each dose was maintained and what symptoms followed.
A simple chronology showing what changed after each medication was started, increased, reduced or stopped may be more useful than a medication list alone.
Severe acute withdrawal, suspected poisoning, seizure, loss of consciousness, respiratory difficulty, suicidal crisis or other immediate deterioration requires emergency medical attention.
🌿 Further Safeguards
The UBC Pharmacists Clinic provides clinical review rather than professional discipline.
Where concerns extend beyond medication assessment, patients and families may submit complaints about a physician’s or psychiatrist’s clinical care or conduct directly to the College of Physicians and Surgeons of British Columbia.[12]
British Columbia law also imposes reporting duties at a substantially higher threshold. Section 85 of the Health Professions and Occupations Act requires a regulated health professional, including a pharmacist, to report another regulated health professional to that professional’s regulatory college where there are reasonable grounds to believe that the practitioner is not fit to practise and that continued practice presents a significant risk of harm to the public. [13]
These mechanisms are distinct from medication review. Most medication problems are addressed through assessment, documentation, communication, care planning and follow-up.
🌿 Another Clinical Route
The UBC Pharmacists Clinic gives patients, families and practitioners direct access to an independent assessment when a medication regimen has become difficult to understand, adverse effects remain unexplained or a person cannot obtain a workable plan for changing treatment.
The clinic can bring the complete regimen, the clinical record and the person’s actual experience into one assessment.
That is the practical value of the service. Another qualified professional can examine the treatment, document what is happening and place the findings before the people responsible for care.
Neither an old prescription nor a longstanding diagnosis should settle the question of what medication is doing to a person now.
A prescription is a clinical intervention, not a permanent explanation.
🌿 References
UBC Faculty of Pharmaceutical Sciences, “Patients,” UBC Pharmacists Clinic.
https://pharmsci.ubc.ca/pharmacists-clinic/services/patients
UBC Faculty of Pharmaceutical Sciences, “Healthcare Professionals,” UBC Pharmacists Clinic.
https://pharmsci.ubc.ca/pharmacists-clinic/services/healthcare-professionals
Medicines and Healthcare products Regulatory Agency, “Extrapyramidal side effects: akathisia,” Antipsychotics learning module.
https://cpd.mhra.gov.uk/antipsychotics/CON155606_13/
Mark Horowitz and David M. Taylor, The Maudsley Deprescribing Guidelines: Antidepressants, Benzodiazepines, Gabapentinoids and Z-drugs, Wiley, 2024.
https://onlinelibrary.wiley.com/doi/book/10.1002/9781394291052
American Society of Addiction Medicine and partner organisations, The Joint Clinical Practice Guideline on Benzodiazepine Tapering: Considerations When Benzodiazepine Risks Outweigh Benefits, 2025.
https://www.asam.org/quality-care/clinical-guidelines/benzodiazepine-tapering
National Institute for Health and Care Excellence, Depression in adults: treatment and management (NG222), and Medicines associated with dependence or withdrawal symptoms: safe prescribing and withdrawal management for adults (NG215).
https://www.nice.org.uk/guidance/ng222/chapter/recommendations
Medicines and Healthcare products Regulatory Agency, “Dependence and withdrawal,” Antipsychotics learning module.
https://cpd.mhra.gov.uk/antipsychotics/CON155606_30/
UBC Faculty of Pharmaceutical Sciences, “UBC Pharmacists Clinic first to gain access to CareConnect for better patient drug therapy monitoring,” 3 February 2021.
https://pharmsci.ubc.ca/news/ubc-pharmacists-clinic-first-gain-access-careconnect-better-patient-drug-therapy-monitoring
College of Pharmacists of British Columbia, Professional Practice Policy 58: Adapting a Prescription.
https://www.bcpharmacists.org/adapting-prescription
UBC Faculty of Pharmaceutical Sciences, “Healthcare Professionals,” UBC Pharmacists Clinic.
https://pharmsci.ubc.ca/pharmacists-clinic/services/healthcare-professionals
UBC Faculty of Pharmaceutical Sciences, “Contact Us,” UBC Pharmacists Clinic.
https://pharmsci.ubc.ca/pharmacists-clinic/contact-us
College of Physicians and Surgeons of British Columbia, “Complaint about clinical care or conduct.”
https://www.cpsbc.ca/public/complaints/how-to-submit-complaint
Health Professions and Occupations Act, S.B.C. 2022, c. 43, s. 85.
https://www.bclaws.gov.bc.ca/civix/document/id/complete/statreg/22043
© Kim M. U-Ming, 2026. Originally published on Medium and Substack, timestamped to establish provenance. This work is part of a larger body of thought. Please do not excerpt, reframe, or republish without express written permission.
