Tricyclic antidepressant (TCA), low-dose (Silenor) used for sleep, higher doses for depression

Silenor (doxepin) Withdrawal

Doxepin discontinuation depends heavily on dose. Low-dose use (3-6 mg, Silenor for sleep) produces minimal withdrawal. Higher antidepressant doses (75-300 mg) produce a TCA-pattern withdrawal with cholinergic rebound similar to amitriptyline.

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

Half-life

~15-30 hours for doxepin; active metabolite ~28-52 hours.

Withdrawal timeline

Onset— 1-3 days after dose reduction

Onset depends on dose; sleep dose produces minimal symptoms.

Peak— Week 1-2

Higher-dose users may have cholinergic rebound peaking in week 1-2.

Resolution— 1-3 weeks (sleep dose); 2-4 weeks (antidepressant dose)

Resolution timeline scales with dose.

Common symptoms

  • Sleep disturbance
  • Vivid dreams
  • Anxiety
  • Return of depression or insomnia

Less common

  • Sweating
  • GI upset
  • Headache

Tapering guidance

  • Low-dose (Silenor) users can often stop directly without a formal taper.
  • Higher-dose users should reduce by 25 mg every 1-2 weeks.
  • Coordinate the taper with the prescribing physician.

Where ketamine therapy fits

Doxepin can be used with at-home ketamine therapy. Closer cardiovascular monitoring is sensible at antidepressant doses. Continue doxepin as prescribed during ketamine treatment unless the prescribing physician advises otherwise.

Check ketamine therapy eligibilityMedication safety with ketamine

Frequently asked questions

How is low-dose doxepin (Silenor) withdrawal different from antidepressant-dose?

Low-dose doxepin (3-6 mg for sleep) produces minimal withdrawal and can usually be stopped directly. Antidepressant doses (75-300 mg) produce a full TCA discontinuation pattern requiring a slow taper.

Is doxepin compatible with ketamine therapy?

Yes, with closer cardiovascular monitoring at antidepressant doses.

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.