Can a patient who has been off trazodone, aripiprazole (Abilify), lorazepam (Ativan), and venlafaxine for seven days be restarted on these medications, and should they be started at lower than the previous full doses?

Restarting Medications After 7-Day Interruption

After a 7-day medication interruption, venlafaxine and trazodone should be restarted at lower doses and gradually titrated back up, while aripiprazole (Abilify) and lorazepam (Ativan) can generally be restarted at previous doses with close monitoring.

Medication-Specific Restart Guidance

Venlafaxine (SNRI)

Restart at reduced dose with gradual titration:

• Start at 37.5 mg once or twice daily (regardless of previous dose)
• Increase by 75 mg weekly as tolerated 1
• Target therapeutic range: 150-225 mg/day
• Rationale: Venlafaxine has a short elimination half-life and is associated with withdrawal syndrome 1. After 7 days off, the drug is completely eliminated (approximately 5 half-lives). Starting at full dose risks adverse effects including blood pressure elevation, cardiac conduction abnormalities, nausea, and activation symptoms 1, 2

Monitor: Blood pressure and pulse at each dose increase 2

Trazodone

Restart at initial dosing:

• Begin at 25 mg daily (typically at bedtime)
• Increase gradually to previous therapeutic dose over 1-2 weeks
• Maximum: 200-400 mg/day in divided doses 3
• Rationale: After 7 days, trazodone is eliminated. Restarting at full dose increases risk of orthostatic hypotension, sedation, and cardiac effects 3

Caution: Use particular care in patients with cardiac history, especially premature ventricular contractions 3

Aripiprazole (Abilify)

Can restart at previous dose with monitoring:

• Aripiprazole has a long elimination half-life (75 hours for aripiprazole, 94 hours for active metabolite)
• After 7 days, significant drug levels may still be present
• If previous dose was well-tolerated, can resume at that dose 4
• If restarting after complete washout or if previous dose caused side effects, consider starting at 2-5 mg and titrating up 5, 6

Monitor: Akathisia, activation symptoms, metabolic parameters (weight, glucose) 5, 6

Lorazepam (Ativan)

Restart at previous dose with caution:

• Lorazepam has intermediate half-life (10-20 hours) and is fully eliminated after 7 days
• Can restart at previous dose if it was well-tolerated
• However, tolerance may have decreased during the 7-day gap, increasing sedation risk 5, 3

Critical considerations:

• Assess for benzodiazepine withdrawal symptoms during the 7-day gap (anxiety, insomnia, tremor, seizures in severe cases)
• If withdrawal symptoms occurred, this indicates physical dependence requiring more gradual taper in future
• Start with lower doses (0.25-0.5 mg) in elderly or frail patients 5
• Risk of falls, cognitive impairment, and paradoxical agitation 3

Key Clinical Pitfalls

Venlafaxine-specific risks:

• Do not restart at full dose—this medication requires titration even after brief interruptions due to withdrawal syndrome risk and dose-dependent adverse effects 1
• The 2-4 week titration period to therapeutic doses (150-225 mg/day) means there will be a gap in full therapeutic coverage 1

Benzodiazepine considerations:

• Seven days off lorazepam is sufficient for physical dependence to manifest withdrawal symptoms
• If patient experienced anxiety, insomnia, or agitation during the 7-day gap, this suggests dependence and future discontinuation should be gradual 3
• Regular benzodiazepine use leads to tolerance, addiction, and cognitive impairment—consider whether continued use is appropriate 3

Antipsychotic monitoring:

• Aripiprazole's long half-life means steady-state takes 2 weeks to achieve 4
• Monitor for extrapyramidal symptoms, akathisia, and metabolic effects even when restarting at previous dose 5, 6

Practical Restart Schedule

Day 1:

• Venlafaxine 37.5 mg daily
• Trazodone 25 mg at bedtime
• Aripiprazole at previous dose (if well-tolerated previously)
• Lorazepam at previous dose (with caution for increased sedation)

Week 1-2:

• Increase venlafaxine by 37.5-75 mg weekly
• Increase trazodone by 25-50 mg every 3-7 days as tolerated
• Monitor blood pressure, pulse, sedation, falls risk

Week 2-4:

• Continue titrating venlafaxine to therapeutic range (150-225 mg/day)
• Reach target trazodone dose
• Assess for withdrawal symptoms, therapeutic response, and adverse effects

Important: If the patient stopped medications due to adverse effects or intentional overdose, reassess whether restarting is appropriate and consider alternative treatments 7, 8, 9.