Which of the listed medications—senna, folic acid, melatonin, vitamin D, vitamin B1, quetiapine, pantoprazole, methotrexate, hydroxychloroquine, gabapentin, duloxetine, calcium, and atorvastatin—should be discontinued first to prevent delirium?

Priority Medications to Discontinue for Delirium Prevention

Discontinue quetiapine, gabapentin, and duloxetine first, as these are the highest-risk medications for inducing delirium among your list.

High-Priority Medications to Stop

1. Quetiapine (Highest Priority)

• Quetiapine is paradoxically deliriogenic despite being used to treat delirium 1
• The American Geriatrics Society guidelines strongly recommend avoiding antipsychotic medications (including quetiapine) as they can induce delirium, particularly in older adults 1
• While quetiapine may offer benefit in treating established delirium symptoms 1, using it prophylactically or continuing it unnecessarily increases delirium risk 1
• Atypical antipsychotics like quetiapine cause CNS impairment, delirium, slowed comprehension, sedation, and falls 1

2. Gabapentin (Second Priority)

• Gabapentin is associated with delirium development 2
• In a prospective cohort study of non-ICU patients, gabapentin was significantly associated with delirium occurrence 2
• While gabapentin has been studied for pain management to reduce opioid use, its direct association with delirium makes it a priority for discontinuation when delirium prevention is the goal 1

3. Duloxetine (Third Priority)

• Duloxetine is significantly associated with delirium 2
• As a serotonin-norepinephrine reuptake inhibitor (SNRI), duloxetine can contribute to serotonin syndrome when combined with other serotonergic medications, which increases delirium risk 1
• SNRIs have higher rates of adverse effects including nausea and vomiting compared to other antidepressants 1

Moderate-Priority Medications to Consider

4. Pantoprazole (Pantoloc)

• H2-receptor antagonists and proton pump inhibitors should be avoided when possible 1
• The American Geriatrics Society Beers Criteria identifies histamine-2 receptor antagonists as medications that induce delirium 1
• While pantoprazole is a PPI rather than an H2-blocker, it contributes to polypharmacy burden 1

5. Melatonin

• Evidence for melatonin preventing delirium is unclear and low quality 3
• There is no clear evidence that melatonin reduces delirium incidence compared to placebo (RR 0.41,95% CI 0.09 to 1.89) 3
• However, melatonin is generally well-tolerated and may help with sleep-wake cycle regulation 1

Medications to Continue (Lower Risk)

Vitamins and Supplements

• Folic acid, vitamin D, vitamin B1 (thiamine), and calcium should generally be continued 1
• While these were associated with delirium in one observational study 2, this likely represents confounding by indication (patients receiving these supplements may have underlying deficiencies that increase delirium risk)
• The Mayo Clinic guidelines note that multiple vitamin/mineral supplements contribute to medication burden but don't directly cause delirium 1
• Important caveat: Address any underlying nutritional deficiencies, as poor nutrition itself is a delirium risk factor 1

Disease-Modifying Medications

• Methotrexate and hydroxychloroquine should typically be continued unless there are other clinical reasons to stop them
• These are disease-modifying antirheumatic drugs (DMARDs) for autoimmune conditions
• Stopping these abruptly could cause disease flares
• No direct evidence links these to delirium causation

Atorvastatin

• Atorvastatin has conflicting evidence regarding delirium 1, 2
• One study found atorvastatin associated with delirium 2, but three cohort studies suggest that stopping statins during critical illness actually increases delirium incidence 1
• The evidence suggests continuing statins may be protective 1
• Consider continuing unless there are other reasons to discontinue

Senna

• Senna (a laxative) has no direct association with delirium
• However, untreated constipation can contribute to delirium
• Continue for bowel management unless contraindicated

Critical Implementation Points

Medication Review Protocol

• Perform a comprehensive medication review addressing both type and number of medications 1
• Polypharmacy (≥5 medications) itself increases delirium risk 1
• Apply the principle: if adding a new long-term medication, discontinue another to prevent increasing drug burden 1

Common Pitfalls to Avoid

• Do not abruptly discontinue medications without considering withdrawal syndromes 1
• Benzodiazepine or alcohol withdrawal can precipitate delirium and requires careful management 1
• Taper psychotropic medications rather than stopping abruptly 1

Monitoring After Discontinuation

• Assess for improvement in cognitive function after stopping deliriogenic medications
• Monitor for any withdrawal symptoms or disease flares from discontinued medications
• Re-evaluate the need for each medication regularly 1