What are the withdrawal symptoms of Fluoxetine (Prozac) and Venlafaxine (Vivance) discontinuation?

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Last updated: April 15, 2025View editorial policy

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From the Guidelines

Withdrawal from Prozac (fluoxetine) and Vivance (likely referring to an SSRI similar to Prozac, given the context) should always be done under medical supervision, never abruptly stopped on your own, to minimize discontinuation symptoms and potential harm to the patient's morbidity, mortality, and quality of life. For Prozac withdrawal, a gradual tapering schedule is typically recommended, often reducing by 10mg every 2-4 weeks due to its long half-life, which helps minimize discontinuation symptoms 1. Common withdrawal symptoms from Prozac include dizziness, fatigue, headaches, irritability, and sensory disturbances, as reported in studies focusing on SSRI discontinuation syndrome 1.

Key Considerations for Withdrawal

  • The decision to withdraw from these medications should be made with careful consideration of the potential benefits and risks, including the risk of relapse into depression or anxiety, and should be based on the most recent and highest quality evidence available 1.
  • A conservative approach to tapering, with gradual reductions in dosage over a period of weeks, is generally recommended to minimize the risk of severe withdrawal symptoms 1.
  • Patient education and support are crucial during the withdrawal process, as patients may experience a range of symptoms and may need guidance on managing these symptoms and staying safe 1.

Managing Withdrawal Symptoms

  • Staying hydrated, maintaining regular sleep patterns, exercising moderately, and practicing stress reduction techniques can help manage withdrawal symptoms alongside medical supervision.
  • Close monitoring by a healthcare provider is essential to adjust the tapering schedule as needed and to provide support and guidance throughout the withdrawal process 1.

Importance of Medical Supervision

  • Medical supervision is critical during the withdrawal process to ensure the patient's safety and to minimize the risk of complications, including severe withdrawal symptoms, relapse, or other adverse effects 1.
  • Healthcare providers should be aware of the potential for withdrawal symptoms and should be prepared to provide guidance and support to patients undergoing withdrawal from Prozac or similar SSRIs.

From the FDA Drug Label

Discontinuation of Treatment with Prozac — During marketing of Prozac and other SSRIs and SNRIs (serotonin and norepinephrine reuptake inhibitors), there have been spontaneous reports of adverse events occurring upon discontinuation of these drugs, particularly when abrupt, including the following: dysphoric mood, irritability, agitation, dizziness, sensory disturbances (e.g., paresthesias such as electric shock sensations), anxiety, confusion, headache, lethargy, emotional lability, insomnia, and hypomania.

Discontinuation symptoms have been systematically evaluated in patients taking venlafaxine, to include prospective analyses of clinical trials in Generalized Anxiety Disorder and retrospective surveys of trials in major depressive disorder Abrupt discontinuation or dose reduction of venlafaxine at various doses has been found to be associated with the appearance of new symptoms, the frequency of which increased with increased dose level and with longer duration of treatment

Prozac and Vivance (Venlafaxine) Withdrawal Symptoms

  • Both Prozac and Vivance have been associated with withdrawal symptoms when discontinued, especially when done abruptly.
  • Symptoms of withdrawal may include:
    • Dysphoric mood
    • Irritability
    • Agitation
    • Dizziness
    • Sensory disturbances
    • Anxiety
    • Confusion
    • Headache
    • Lethargy
    • Emotional lability
    • Insomnia
    • Hypomania
  • A gradual reduction in dose is recommended to minimize the risk of withdrawal symptoms 2 3.

From the Research

Prozac and Vivance Withdrawal

  • The withdrawal symptoms of Prozac (fluoxetine) and Vivance (venlafaxine) can be managed through gradual tapering, except for fluoxetine which has an extended half-life 4.
  • Discontinuation symptoms of selective serotonin reuptake inhibitors (SSRIs) like fluoxetine can be mild, short-lived, and self-limiting, but may also be distressing and lead to decreased productivity 4.
  • A study found that switching to fluoxetine can be an effective method for discontinuing venlafaxine, as it helps to minimize withdrawal symptoms 5.
  • Withdrawal symptomatology may not subside within a few weeks and can be associated with other manifestations of behavioral toxicity, making it essential to understand and manage withdrawal syndromes properly 6.
  • Comparing venlafaxine and fluoxetine, both medications have been found to be effective and well-tolerated for the treatment of major depression, with similar efficacy and safety profiles 7, 8.
  • In terms of preventing the recurrence of major depression, venlafaxine ER and fluoxetine have been compared, with results showing that venlafaxine ER may have a higher estimated probability of not experiencing a recurrence 8.

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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