If Withdrawing From Venlafaxine Will Taking It Again Stop the Withdrawal

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• a gradual tapering of dose should be considered when discontinuing a selective serotonin uptake inhibitor (SSRI) (1)
• note that although dose tapering may not be required for handling with fluoxetine due to its long half life and that of its active metabolite, patients should be closely monitored

Dainty suggest a four week period for withdrawal of antidepressant treatment (4):

• stopping or reducing antidepressants
  • advise people that discontinuation symptoms may occur on stopping, missing doses or, occasionally, reducing the dose of the drug. Explain that these are usually mild and cocky-limiting over about i week, just can exist severe, particularly if the drug is stopped abruptly
  • unremarkably, gradually reduce the dose over four weeks (this is not necessary with fluoxetine). Reduce the dose over longer periods for drugs with a shorter half-life (for example, paroxetine and venlafaxine)
  • propose the person to see their practitioner if they feel pregnant discontinuation symptoms. If symptoms occur:
    • monitor them and reassure the person if symptoms are balmy
    • consider reintroducing the original antidepressant at the dose that was effective (or another antidepressant with a longer half-life from the aforementioned class) if symptoms are severe, and reduce the dose gradually while monitoring symptoms
  • for detailed guidance and so consult the full guideline (4)

Antidepressant use: swapping and stopping

The tables below have been adjusted from the Maudsley prescribing guidelines (2,three). All the same it is recommended that local prescribing guidelines and/or specialist psychiatric communication must be consulted when swapping antidepressant medication. Also the specific summary of production characteristics for each of the antidepressants involved should exist consulted. It has been noted that in that location are no clear guidelines on switching antidepressants, so circumspection is required (2,iii).

Vortioxetine switching (3)

• vortioxetine is a new antidepressant and there is express experience when switching, therefore extra circumspection is required, particularly when switching to or from inhibitors of CYP2D6, such as fluoxetine and paroxetine
• when switching to another antidepressant, doses to a higher place 10mg should be reduced to 10mg over a period of 7 days before stopping and starting the new antidepressant

Antidepressant use: swapping and stopping

The tables below take been adjusted from the Maudsley prescribing guidelines (2,3). However information technology is recommended that local prescribing guidelines and/or specialist psychiatric advice must be consulted when swapping antidepressant medication. Also the specific summary of product characteristics for each of the antidepressants involved should be consulted. It has been noted that in that location are no clear guidelines on switching antidepressants, so caution is required (ii).

Table showing switching from either:

• fluoxetine 20mg per day, or
• a tricyclic antidepressant, or
• clomipramine, or
• venlfaxine

to an alternative antidepressant

Table showing switching from either:

• citalopram, escitalopram, paroxetine or sertraline; OR
• fluvoxamine

to an alternative antidepressant

Tabular array showing switching from either:

• duloextine, OR,
• mirtazapine, OR,
• reboxetine, OR,
• agomelatne, OR,
• vortioxetine

to an alternative antidepressant

Squeamish guidance regarding switching antidepressants is less detailed (4):

• do not switch to, or get-go, dosulepin
  • considering bear witness supporting its tolerability relative to other antidepressants is outweighed by the increased cardiac risk and toxicity in overdose
• when switching to another antidepressant, which can normally exist achieved within 1 calendar week when switching from drugs with a brusk half life, consider the potential for interactions in determining the choice of new drug and the nature and duration of the transition. Practise particular caution when switching:
  • from fluoxetine to other antidepressants, because fluoxetine has a long one-half-life (approximately 1 week)
  • from fluoxetine or paroxetine to a TCA, considering both of these drugs inhibit the metabolism of TCAs; a lower starting dose of the TCA volition be required, particularly if switching from fluoxetine because of its long half-life
  • to a new serotonergic antidepressant or MAOI, because of the risk of serotonin syndrome
  • from a non-reversible MAOI: a 2-calendar week washout period is required (other antidepressants should not be prescribed routinely during this period).

Notes:

• do non co-administer clomipramine and SSRIs or venlafaxine
• when switching between one SSRI and another, some consider cantankerous-tapering the doses generally not to be necessary (six,vii)
  • selective serotonin reuptake inhibitors (SSRIs) overlap in their machinery of action, and the new SSRI volition usually preclude discontinuation symptoms that may occur when the first SSRI is stopped. Substituting a new SSRI at the relatively equivalent dose of the former SSRI is typically well-tolerated , though starting the new SSRI at a lower dose may besides exist considered since patients occasionally have idiosyncratic side effects to detail SSRIs (five)
  • the New Zealand formularly guidance (6) supports no need for cross-tapering for switching between short acting SSRIs (citalopram, escitalopram, paroxetine, sertraline) - but for switches from fluoxetine and then it supports the Maudsley guidance and states
    • stop fluoxetine, wait 4 - seven days, kickoff SSRI at low dose (low dose= citalopram 10mg/24-hour interval; escitalopram 5mg/day; paroxetine 10mg/day; sertraline 25mg/twenty-four hours)
  • the furnishings of the first SSRI are likely to be then like to that of the 2d ane, that the 2nd SSRI will reduce the discontinuation effects of the first (2). The abrupt switch between SSRIs may still produce discontinuation symptoms, and vigilance is nonetheless advised. In cases where discontinuation symptoms arise a short catamenia of dose tapering is recommended before starting a unlike SSRI
• * withdrawal furnishings may be more pronounced. Irksome withdrawal over i-2 months may be necessary.

Reference:

1. Electric current Problems in Pharmacovigilance 2000; 26:eleven-12.
2. The Maudsley Prescribing Guidelines 2001; 6th Ed, p64 - 65.
3. UKMi (NHS). How exercise you switch betwixt tricyclic, SSRI and related antidepressants? (November 2015)
4. NICE (October 2009). Depression
5. MIMS - Switching and Withdrawing Antidepressants (Accessed 6/8/thirteen).
6. UptoDate - Antidepressant medication in adults: Switching and discontinuing medication (Accessed 6/8/xiii)
7. Using the New Zealand Formulary : Guide for switching antidepressants (Accessed 6/viii/xiii)

Final edited 09/2020

Links:

• fluoxetine
• stopping and/or swapping antidepressant treatment
• discontination syndromes with SSRIs

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