Coming off sertraline — what to expect and how to do it safely

Sertraline — the basics

Sertraline (brand name Lustral in the UK, Zoloft elsewhere) is a selective serotonin reuptake inhibitor (SSRI). It is prescribed for depression, anxiety disorders, OCD, PTSD and panic disorder, and it is the most dispensed antidepressant in England by volume.

Standard doses range from 50mg to 200mg daily. It has a moderate half-life of around 26 hours — meaning it leaves the body relatively quickly compared to fluoxetine (Prozac), which can linger for weeks. This shorter half-life makes careful tapering important: the nervous system notices changes in sertraline levels more quickly than with longer-acting antidepressants.

Can sertraline be hard to stop?

Yes — for a significant proportion of people, especially those who have been taking it for more than a year or at higher doses. The standard NHS guidance of reducing over two to four weeks is appropriate for some people but is too fast for many, particularly long-term users.

The most commonly reported sertraline withdrawal symptoms include:

• Dizziness and lightheadedness — often one of the first symptoms to appear
• Nausea and flu-like sensations — sometimes mistaken for physical illness
• Electric shock sensations — often called "brain zaps", a characteristic antidepressant withdrawal symptom
• Sleep disruption — vivid dreams, early waking, difficulty falling asleep
• Anxiety and irritability — which can be alarming and is frequently misread as relapse
• Low mood and emotional fluctuation — again, easily confused with depression returning
• Difficulty concentrating — brain fog, word-finding difficulties

These symptoms are not signs that something has gone wrong with you. They are signs that the nervous system is readjusting — and with the right pace, they can be kept manageable throughout.

The right way to taper sertraline

Current guidance from NICE and the Royal College of Psychiatrists recommends hyperbolic tapering — reducing by a proportion of the current dose at each step, rather than a fixed amount. This is because the relationship between dose and effect on the brain follows a curved, not a straight line.

What this means in practice for sertraline:

• Reductions from higher doses (e.g. 200mg to 150mg to 100mg) can often be made more comfortably and relatively quickly
• Reductions at lower doses (e.g. 50mg to 25mg to 12.5mg and below) need to be made more slowly
• Standard sertraline tablets come in 50mg and 100mg — splitting or liquid preparations become necessary for precise lower-dose reductions
• Sertraline is available in liquid form (10mg/ml oral solution) in the UK, which allows very small, precise reductions at the lower end
• A typical total reduction period for someone on sertraline for five or more years might be twelve to eighteen months

Will my depression come back if I stop?

This is the question most people ask — and it is a genuinely important one. The honest answer is: it depends, and it is not always possible to know in advance.

What is known is that stopping antidepressants too quickly significantly increases the chance of experiencing symptoms that look like relapse but are actually withdrawal. When this is correctly identified and managed — by slowing the taper or holding the current dose — the symptoms usually settle without the medication needing to be reinstated.

True relapse of depression, after a successful period of treatment, tends to develop more gradually, resemble the original presentation, and not include the physical symptoms that characterise withdrawal. A careful clinical assessment can help distinguish between the two.

Our explainer on this topic goes into considerably more detail: Withdrawal or relapse — understanding the difference.

What if I have tried to stop before and found it very difficult?

This is extremely common and is almost never a sign that the medication is needed permanently. It is usually a sign that the previous attempt was made too quickly, without adequate support, or without a framework for interpreting what was happening.

Many of the people who come to us have tried to stop sertraline once or twice before — sometimes on the advice of a GP who suggested a two-week taper — and found the experience frightening or destabilising. Reinstating and trying again more slowly, with proper clinical oversight, is usually entirely possible.