Tricyclic antidepressant (TCA)

Tofranil (imipramine) Withdrawal

Imipramine has a discontinuation pattern dominated by cholinergic rebound, similar to amitriptyline. Less commonly prescribed now than in the past. Most patients can taper without major difficulty when the schedule is gradual.

By Dr. Ben Soffer, DO — board-certified physician, at-home ketamine therapy in Florida and New Jersey.

Half-life

~6-20 hours for imipramine; active metabolite desipramine has its own ~12-30 hour half-life.

Withdrawal timeline

Onset— 1-3 days after dose reduction

Symptoms typically emerge within a few days.

Peak— Week 1-2

Symptoms peak in the first 1-2 weeks.

Resolution— 2-4 weeks

Most patients return to baseline within a month.

Common symptoms

  • Sleep disturbance
  • Nausea
  • Sweating
  • Headache
  • Anxiety
  • Return of underlying condition

Less common

  • Vivid dreams
  • Diarrhea
  • Mild dizziness

Tapering guidance

  • A typical taper reduces by 25 mg every 1-2 weeks.
  • Coordinate the taper with the prescribing physician.

Where ketamine therapy fits

Imipramine can be used with at-home ketamine therapy with closer cardiovascular monitoring (TCA effects on heart rhythm and blood pressure). Continue imipramine as prescribed during ketamine treatment unless the prescribing physician advises otherwise.

Check ketamine therapy eligibilityMedication safety with ketamine

Frequently asked questions

How long does imipramine withdrawal last?

Most patients return to baseline within 2-4 weeks. Cholinergic rebound symptoms peak in the first 1-2 weeks.

Is imipramine compatible with ketamine therapy?

Generally yes, with closer cardiovascular monitoring. Continue imipramine as prescribed unless your physician advises otherwise.

Important: This page is informational and does not constitute medical advice or a recommendation to start, stop, or change any medication. Tapering psychiatric medications should always be coordinated with the prescribing physician. Compounded ketamine for anxiety, depression, PTSD, and chronic pain is not FDA approved.

Browse all medication withdrawal guides.