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Sertraline – Effects, Dosage and Side Effects

Sertraline is a prescription antidepressant belonging to the SSRI class, widely used to treat depression, anxiety disorders, and other mental health conditions.

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Things worth knowing about "Sertraline"

Sertraline is a prescription antidepressant belonging to the SSRI class, widely used to treat depression, anxiety disorders, and other mental health conditions.

What is Sertraline?

Sertraline is an antidepressant belonging to the drug class of selective serotonin reuptake inhibitors (SSRIs). It is one of the most commonly prescribed psychiatric medications worldwide and is available by prescription only. Sertraline is marketed under various brand names, most notably Zoloft, as well as numerous generic formulations.

Indications

Sertraline is approved for a range of psychiatric conditions and is used in the treatment of:

Major depressive disorder (MDD)
Panic disorder with or without agoraphobia
Social anxiety disorder (social phobia)
Post-traumatic stress disorder (PTSD)
Obsessive-compulsive disorder (OCD) in adults and children aged 6 and older
Premenstrual dysphoric disorder (PMDD)

Mechanism of Action

Sertraline works by inhibiting the serotonin transporter (SERT) in the brain. Serotonin is a neurotransmitter that plays a key role in regulating mood, sleep, appetite, and anxiety. Under normal circumstances, serotonin is reabsorbed into the releasing nerve cell after being released into the synaptic cleft. Sertraline blocks this reuptake process, allowing more serotonin to remain in the synaptic cleft and exert a prolonged effect on the receiving neuron. This leads to an improvement in mood and a reduction in anxiety symptoms over a period of several weeks.

Dosage

Dosage of sertraline is determined individually by the prescribing physician. Typical dosage ranges include:

Adults: Starting dose of 25–50 mg per day, titrated up to 50–200 mg per day based on response and tolerability
Children and adolescents (OCD, aged 6 and above): Starting dose of 25 mg per day, maximum 200 mg per day
Sertraline is typically taken once daily, with or without food
The full therapeutic effect usually becomes apparent after 2–6 weeks of treatment

Sertraline should not be discontinued abruptly without consulting a physician, as sudden discontinuation can trigger a discontinuation syndrome (e.g., dizziness, nausea, irritability).

Side Effects

Like all medications, sertraline can cause side effects. Common side effects include:

Nausea, diarrhea, or gastrointestinal discomfort
Insomnia or drowsiness
Headaches
Dry mouth
Sexual dysfunction (e.g., decreased libido, delayed orgasm)
Increased sweating
Tremor

Rare but serious side effects include serotonin syndrome (a potentially life-threatening condition caused by excessive serotonin activity, often triggered by drug interactions) and an increased risk of bleeding, particularly when taken alongside blood thinners or anti-inflammatory pain medications such as ibuprofen.

Drug Interactions

Sertraline can interact with numerous other substances. The most clinically important interactions include:

MAO inhibitors (e.g., tranylcypromine, selegiline): Combination is contraindicated and can trigger a life-threatening serotonin syndrome
Other serotonergic substances (e.g., tramadol, lithium, triptans): increased risk of serotonin syndrome
Anticoagulants (e.g., warfarin): increased bleeding risk
NSAIDs (e.g., ibuprofen, aspirin): increased risk of gastrointestinal bleeding

Use During Pregnancy and Breastfeeding

The use of sertraline during pregnancy requires careful consideration. There is evidence of a slightly increased risk of neonatal adaptation syndrome in newborns when sertraline is taken in late pregnancy. The benefit to the mother must be weighed against potential risks to the child. During breastfeeding, sertraline passes into breast milk in small amounts. Any decision should always be made in consultation with the treating physician.

References

American Psychiatric Association (APA): Practice Guideline for the Treatment of Patients with Major Depressive Disorder, 3rd edition, 2010 (updated guidance 2022).
European Medicines Agency (EMA): Summary of Product Characteristics for Sertraline, current version.
Stahl S.M.: Stahl's Essential Psychopharmacology. Cambridge University Press, 5th edition, 2021.

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