SSRI (selective serotonin reuptake inhibitor)

Celexa (citalopram) Withdrawal

Celexa has a moderate discontinuation profile similar to its single-enantiomer cousin Lexapro. The relatively long half-life smooths the washout, and most patients can taper without significant 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

~35 hours. Celexa is the racemic parent of Lexapro (escitalopram), with a similar half-life and a similar discontinuation profile.

Withdrawal timeline

Onset— 1-3 days after dose reduction

Symptoms emerge gradually as serum levels fall.

Peak— Week 1-2

Symptom intensity is highest in the first 7-14 days.

Resolution— 2-4 weeks

Most patients are through the acute phase within a month.

Common symptoms

  • Dizziness or lightheadedness
  • Nausea
  • Headache
  • Flu-like fatigue
  • Irritability
  • Vivid dreams
  • Anxiety rebound

Less common

  • Sweating
  • Brief brain zaps
  • Mild tremor
  • Sensory disturbances

Tapering guidance

  • A typical taper reduces the daily dose by 10 mg every 2-4 weeks (e.g., 40 mg to 30 mg to 20 mg to 10 mg to off).
  • A liquid oral solution is available for finer titration if the standard step sizes produce symptoms.
  • Coordinate any taper with the prescribing physician.

Where ketamine therapy fits

Celexa is fully compatible with at-home ketamine therapy. SSRIs and ketamine work through different mechanisms with no required washout. Continue Celexa as prescribed during treatment unless the prescribing physician advises otherwise. The conversation about ketamine most often comes up for patients seeking a different mechanism for incomplete response, or patients tapering Celexa whose depression begins to return.

Check ketamine therapy eligibilityMedication safety with ketamine

Frequently asked questions

How long does Celexa withdrawal last?

Most patients experience peak symptoms in the first 1-2 weeks after their last dose and full resolution within 3-4 weeks. Celexa is generally well-tolerated to taper given its relatively long half-life.

What is the difference between Celexa and Lexapro for withdrawal?

Lexapro (escitalopram) is the single-enantiomer version of Celexa (citalopram). Withdrawal profiles are very similar because half-life and mechanism overlap. Lexapro is sometimes described as slightly cleaner because only the active enantiomer is present.

Is Celexa compatible with ketamine therapy?

Yes. SSRIs including citalopram are compatible with at-home ketamine therapy with no washout. Continue your normal Celexa dose during ketamine treatment unless your prescribing physician specifically 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.

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