Side Effects of Zoloft (sertraline)

Zoloft (sertraline) is a serotonin reuptake inhibitor (SSRI) antidepressant used to treat depression, obsessive-compulsive disorder (OCD), panic disorder, post-traumatic stress disorder (PTSD), social anxiety disorder, and premenstrual dysphoric disorder (PMDD).

Withdrawal symptoms such as abdominal cramps, fatigue, nausea, vomiting, diarrhea, headaches, lightheadedness, dizziness, decreased appetite, flu-like symptoms, sweating, chills, insomnia, and memory impairment may occur if you suddenly stop taking Zoloft.

Drug interactions of Zoloft include monoamine oxidase inhibitors (MAOIs), tryptophan, St. John's wort, meperidine, tramadol, cimetidine, pimozide, and warfarin. Use of Zoloft during the 3rd trimester of pregnancy may lead to adverse effects in the newborn. Use of Zoloft by nursing mothers has not been adequately evaluated.

WARNING

As demonstrated in short-term studies, antidepressants increased the risk of suicidal thinking and behavior (suicidality) in children and adolescents with depression and other psychiatric disorders. Anyone considering the use of Zoloft or any other antidepressant in a child or adolescent must balance this risk with the clinical need for the antidepressant. Patients who are started on therapy should be closely observed for clinical worsening, suicidal thoughts, or unusual changes in behavior.

What are the common side effects of Zoloft?

The most common side effects of Zoloft are:

• Sleepiness
• Nervousness
• Insomnia
• Dizziness
• Nausea
• Tremor
• Skin rash
• Constipation
• Upset stomach
• Loss of appetite
• Headache
• Diarrhea
• Abnormal ejaculation
• Decreased interest in sexual activity
• Dry mouth
• Increase in sweating, known as diaphoresis
• Weight loss

What are the serious side effects of Zoloft?

Possible serious side effects of Zoloft include:

• Irregular heartbeats
• Serious allergic reactions
• Worsening of depression
• Serotonin syndrome
• Hyponatremia
• Abnormal bleeding
• Priapism (prolonged erection)
• Decreased liver function
• Suicidality
• Activation of mania in patients with bipolar disorder

Important side effects are irregular heartbeats, allergic reactions and activation of mania in patients with bipolar disorder.

If Zoloft is discontinued abruptly, some patients experience side effects such as:

• Abdominal cramps
• Fatigue
• Nausea
• Vomiting
• Diarrhea
• Headaches
• Lightheadedness
• Dizziness
• Diminished appetite
• Flu-like symptoms
• Sweating
• Chills
• Sleep disturbances
• Memory impairment

A gradual dose reduction of Zoloft is recommended when therapy is discontinued.

Zoloft contains sertraline, which is not a controlled substance.

Abuse

• In a placebo-controlled, double-blind, randomized study of the comparative abuse liability of Zoloft, alprazolam, and d-amphetamine in humans, Zoloft did not produce the positive subjective effects indicative of abuse potential, such as euphoria or drug liking, that were observed with the other two drugs.

Clinically Significant Drug Interactions

Table 5 includes clinically significant drug interactions with Zoloft.

Drugs Having No Clinically Important Interactions With Zoloft

Based on pharmacokinetic studies, no dosage adjustment of Zoloft is necessary when used in combination with cimetidine. Additionally, no dosage adjustment is required for diazepam, lithium, atenolol, tolbutamide, digoxin, and drugs metabolized by CYP3A4, when Zoloft is administered concomitantly.

False-Positive Screening Tests For Benzodiazepines

False-positive urine immunoassay screening tests for benzodiazepines have been reported in patients taking Zoloft. This finding is due to lack of specificity of the screening tests. False-positive test results may be expected for several days following discontinuation of Zoloft. Confirmatory tests, such as gas chromatography/mass spectrometry, will distinguish sertraline from benzodiazepines.

The following adverse reactions are described in more detail in other sections of the prescribing information:

• Hypersensitivity reactions to sertraline
• Disulfiram-alcohol reaction when Zoloft oral solution is taken with disulfiram
• QTc prolongation and ventricular arrhythmias when taken with pimozide
• Suicidal thoughts and behaviors
• Serotonin syndrome
• Increased risk of bleeding
• Activation of mania/hypomania
• Discontinuation syndrome
• Seizures
• Angle-closure glaucoma
• Hyponatremia

Clinical Trials Experience

Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice.

The data described below are from randomized, double-blind, placebo-controlled trials of Zoloft (mostly 50 mg to 200 mg per day) in 3066 adults diagnosed with MDD, OCD, PD, PTSD, SAD, and PMDD. These 3066 patients exposed to Zoloft for 8 to12 weeks represent 568 patient-years of exposure. The mean age was 40 years; 57% were females and 43% were males.

The most common adverse reactions (>5% and twice placebo) in all pooled placebo-controlled clinical trials of all Zoloft-treated patients with MDD, OCD, PD, PTSD, SAD and PMDD were nausea, diarrhea/loose stool, tremor, dyspepsia, decreased appetite, hyperhidrosis, ejaculation failure, and decreased libido (see Table 3). The following are the most common adverse reactions in trials of Zoloft (>5% and twice placebo) by indication that were not mentioned previously.

• MDD: somnolence;
• OCD: insomnia, agitation;
• PD: constipation, agitation;
• PTSD: fatigue;
• PMDD: somnolence, dry mouth, dizziness, fatigue, and abdominal pain;
• SAD: insomnia, dizziness, fatigue, dry mouth, malaise.

Adverse Reactions Leading To Discontinuation In Placebo-Controlled Clinical Trials

In all placebo-controlled studies in patients with MDD, OCD, PD, PTSD, SAD and PMDD, 368 (12%) of the 3066 patients who received Zoloft discontinued treatment due to an adverse reaction, compared with 93 (4%) of the 2293 placebo-treated patients. In placebo-controlled studies, the following were the common adverse reactions leading to discontinuation in Zoloft-treated patients:

• MDD, OCD, PD, PTSD, SAD and PMDD: nausea (3%), diarrhea (2%), agitation (2%), and insomnia (2%).
• MDD (>2% and twice placebo): decreased appetite, dizziness, fatigue, headache, somnolence, tremor, and vomiting.
• OCD: somnolence.
• PD: nervousness and somnolence.

Male And Female Sexual Dysfunction

Although changes in sexual desire, sexual performance and sexual satisfaction often occur as manifestations of a psychiatric disorder, they may also be a consequence of SSRI treatment. However, reliable estimates of the incidence and severity of untoward experiences involving sexual desire, performance and satisfaction are difficult to obtain, in part because patients and healthcare providers may be reluctant to discuss them. Accordingly, estimates of the incidence of untoward sexual experience and performance cited in labeling may underestimate their actual incidence.

Table 4 below displays the incidence of sexual adverse reactions reported by at least 2% of Zoloft-treated patients and twice placebo from pooled placebo-controlled trials. For men and all indications, the most common adverse reactions (>2% and twice placebo) included: ejaculation failure, decreased libido, erectile dysfunction, ejaculation disorder, and male sexual dysfunction. For women, the most common adverse reaction (≥2% and twice placebo) was decreased libido.

Adverse Reactions In Pediatric Patients

In 281 pediatric patients treated with Zoloft in placebo-controlled studies, the overall profile of adverse reactions was generally similar to that seen in adult studies. Adverse reactions that do not appear in Table 3 (most common adverse reactions in adults) yet were reported in at least 2% of pediatric patients and at a rate of at least twice the placebo rate include fever, hyperkinesia, urinary incontinence, aggression, epistaxis, purpura, arthralgia, decreased weight, muscle twitching, and anxiety.

Other Adverse Reactions Observed During The Premarketing Evaluation Of Zoloft

Other infrequent adverse reactions, not described elsewhere in the prescribing information, occurring at an incidence of < 2% in patients treated with Zoloft were:

Cardiac disorders – tachycardia

Ear and labyrinth disorders – tinnitus

Endocrine disorders - hypothyroidism

Eye disorders - mydriasis, blurred vision

Gastrointestinal disorders - hematochezia, melena, rectal hemorrhage

General disorders and administration site conditions - edema, gait disturbance, irritability, pyrexia

Hepatobiliary disorders - elevated liver enzymes

Immune system disorders - anaphylaxis

Metabolism and nutrition disorders - diabetes mellitus, hypercholesterolemia, hypoglycemia, increased appetite

Musculoskeletal and connective tissue disorders - arthralgia, muscle spasms, tightness, or twitching

Nervous system disorders - ataxia, coma, convulsion, decreased alertness, hypoesthesia, lethargy, psychomotor hyperactivity, syncope

Psychiatric disorders - aggression, bruxism, confusional state, euphoric mood, hallucination

Renal and urinary disorders - hematuria

Reproductive system and breast disorders - galactorrhea, priapism, vaginal hemorrhage

Respiratory, thoracic and mediastinal disorders - bronchospasm, epistaxis, yawning

Skin and subcutaneous tissue disorders - alopecia; cold sweat; dermatitis; dermatitis bullous; pruritus; purpura;erythematous, follicular, or maculopapular rash; urticaria

Vascular disorders – hemorrhage, hypertension, vasodilation

Post-marketing Experience

The following adverse reactions have been identified during postapproval use of Zoloft. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.

Bleeding or clotting disorders - increased coagulation times (altered platelet function)

Cardiac disorders - AV block, bradycardia, atrial arrhythmias, QTc-interval prolongation, ventricular tachycardia (including Torsade de Pointes)

Endocrine disorders - gynecomastia, hyperprolactinemia, menstrual irregularities, SIADH

Eye disorders - blindness, optic neuritis, cataract

Hepatobiliary disorders - severe liver events (including hepatitis, jaundice, liver failure with some fatal outcomes), pancreatitis

Hemic and lymphatic disorders - agranulocytosis, aplastic anemia and pancytopenia, leukopenia, thrombocytopenia, lupus-like syndrome, serum sickness

Immune system disorders - angioedema

Metabolism and nutrition disorders - hyponatremia, hyperglycemia

Musculoskeletal and connective tissue disorders - rhabdomyolysis, trismus

Nervous system disorders - serotonin syndrome, extrapyramidal symptoms (including akathisia and dystonia), oculogyric crisis

Psychiatric disorders - psychosis, enuresis, paroniria

Renal and urinary disorders - acute renal failure

Respiratory, thoracic and mediastinal disorders - pulmonary hypertension

Skin and subcutaneous tissue disorders - photosensitivity skin reaction and other severe cutaneous reactions, which potentially can be fatal, such as Stevens-Johnson Syndrome (SJS) and toxic epidermal necrolysis (TEN)

Vascular disorders - cerebrovascular spasm (including reversible cerebral vasoconstriction syndrome and Call-Fleming syndrome), vasculitis