Indications

Oxapro is indicated in the-

• Treatment of major depressive episodes.
• Treatment of panic disorder with or without agoraphobia.
• Treatment of social anxiety disorder (social phobia).
• Treatment of generalised anxiety disorder.
• Treatment of obsessive-compulsive disorder.

* রেজিস্টার্ড চিকিৎসকের পরামর্শ মোতাবেক ঔষধ সেবন করুন'

Pharmacology

Escitalopram is an orally administered selective serotonin reuptake inhibitor (SSRI). Escitalopram is the pure S-enantiomer of the racemic bicyclic phthalate derivative citalopram. Escitalopram is at least 100 fold more potent than the R-enantiomer with respect to inhibition of 5-HT reuptake. Escitalopram has no or very low affinity for serotonergic or other receptors including alpha- and beta-adrenergic Dopamine, Histamine, Muscarinic and benzodiazepine receptors.

Dosage

Safety of daily doses above 20 mg has not been demonstrated. Escitalopram Oxalate is administered as a single daily dose and may be taken with or without food.

Major depressive episodes: Usual dosage is 10 mg once daily. Depending on individual patient response, the dose may be increased to a maximum of 20 mg daily. Usually, 2-4 weeks are necessary to obtain an antidepressant response. After the symptoms resolve, treatment for at least 6 months is required for consolidation of the response.

Panic disorder with or without agoraphobia: An initial dose of 5 mg is recommended for the first week before increasing the dose to 10 mg daily. The dose may be further increased, up to a maximum of 20 mg daily, dependent on individual patient response. Maximum effectiveness is reached after about 3 months. The treatment lasts several months.

Social anxiety disorder: Usual dosage is 10 mg once daily. Usually, 2-4 weeks are necessary to obtain symptom relief. The dose may subsequently, depending on individual patient response, be decreased to 5 mg or increased to a maximum of 20 mg daily. Social anxiety disorder is a disease with a chronic course, and treatment for 12 weeks is recommended to consolidate response. Long-term treatment of responders has been studied for 6 months and can be considered on an individual basis to prevent relapse; treatment benefits should be re-evaluated at regular intervals. Social anxiety disorder is a well-defined diagnostic terminology of a specific disorder, which should not be confounded with excessive shyness. Pharmacotherapy is only indicated if the disorder interferes significantly with professional and social activities. The place of this treatment compared to cognitive behavioural therapy has not been assessed. Pharmacotherapy is part of an overall therapeutic strategy.

Generalised anxiety disorder: Initial dosage is 10 mg once daily. Depending on the individual patient response, the dose may be increased to a maximum of 20 mg daily. Long term treatment of responders has been studied for at least 6 months in patients receiving 20 mg/day. Treatment benefits and dose should be re-evaluated at regular intervals.

Obsessive-Compulsive Disorder: Initial dosage is 10 mg once daily. Depending on the individual patient response, the dose may be increased to a maximum of 20 mg daily. As OCD is a chronic disease, patients should be treated for a sufficient period to ensure that they are symptom-free. Treatment benefits and dose should be re-evaluated at regular intervals.

* রেজিস্টার্ড চিকিৎসকের পরামর্শ মোতাবেক ঔষধ সেবন করুন'

Administration

Escitalopram should generally be administered once daily, morning or evening with or without food.

* রেজিস্টার্ড চিকিৎসকের পরামর্শ মোতাবেক ঔষধ সেবন করুন'

Interaction

As SSRI or related antidepressants should not be started until 2 weeks after stopping an MAOI. Conversely, an MAOI should not. be started until at least a week after an SSRI or related antidepressant has been stopped (2 weeks in the case of paroxetine and sertraline, at least 5 weeks in the case of fluoxetine).

Contraindications

Escitalopram is contraindicated in patients with known hypersensitivity to Escitalopram or Citalopram or any of the inactive ingredients of the drug product. Concomitant use of escitalopram in patients taking monoamine oxidase/pimozide is contraindicated.

Side Effects

SSRIs are less sedating and have fewer antimuscarinic and cardiotoxic effects than tricyclic antidepressants. Side-effects of the SSRIs include gastrointestinal effects (dose-related and fairly common include nausea, vomiting, dyspepsia, abdominal pain, diarrhoea, constipation), anorexia with weight loss (increased appetite and weight gain also reported) and hypersensitivity reactions including rash, urticaria, angioedema, anaphylaxis, arthralgia, myalgia, and photosensitivity; other side-effects include dry mouth, nervousness, anxiety, headache, insomnia, tremor, dizziness, asthenia, hallucinations, drowsiness, convulsions, galactorrhoea, sexual dysfunction, urinary retention, sweating, hypomania or mania, movement disorders and dyskinesias, visual disturbances.

Pregnancy & Lactation

When treating a pregnant woman with Escitalopram during the third trimester, the physician should carefully consider the potential risks and benefits of treatment. It is excreted in human breast milk. The decision whether to continue or discontinue either nursing or Escitalopram therapy should take into account the risk of citalopram exposure for the infant and the benefits Escitalopram treatment for the mother.

Precautions & Warnings

SSRIs should be used with caution in patients with epilepsy (avoid if poorly controlled, discontinue if convulsions develop), concurrent electroconvulsive therapy (prolonged seizures reported with fluoxetine), history of mania, cardiac disease, diabetes mellitus, angle-closure glaucoma, concomitant use of drugs that increase risk of bleeding, history of bleeding disorders (especially gastro-lntestinal bleeding), hepatic and renal impairment.

Use in Special Populations

Elderly patients (>65 years of age): Initial dosage is 5 mg once daily. Depending on the individual patient response the dose may be increased to 10 mg daily. The efficacy of escitalopram in social anxiety disorder has not been studied in elderly patients.

Children and adolescents (<18 years): Oxapro should not be used in the treatment of children and adolescents under the age of 18 years.

Reduced renal function: Dosage adjustment is not necessary in patients with mild or moderate renal impairment. Caution is advised in patients with severely reduced renal function (CLCR less than 30 ml/min).

Reduced hepatic function: An initial dose of 5 mg daily for the first two weeks of treatment is recommended in patients with mild or moderate hepatic impairment. Depending on individual patient response, the dose may be increased to 10 mg daily. Caution and extra careful dose titration is advised in patients with severely reduced hepatic function.

Poor metabolizers of CYP2C19: For patients who are known to be poor metabolisers with respect to CYP2C19, an initial dose of 5 mg daily during the first two weeks of treatment is recommended. Depending on individual patient response, the dose may be increased to 10 mg daily. Discontinuation symptoms seen when stopping treatment. Abrupt discontinuation should be avoided.

When stopping treatment with escitalopram the dose should be gradually reduced over a period of at least one to two weeks in order to reduce the risk of discontinuation symptoms. If intolerable symptoms occur following a decrease in the dose or upon discontinuation of treatment, then resuming the previously prescribed dose may be considered. Subsequently, the physician may continue decreasing the dose, but at a more gradual rate.

Overdose Effects

Symptoms: Symptoms seen in a reported overdose of escitalopram include symptoms mainly related to the central nervous system (ranging from dizziness, tremor, and agitation to rare cases of serotonin syndrome, convulsion, and coma), the gastrointestinal system (nausea/vomiting), and the cardiovascular system (hypotension, tachycardia, QT interval, prolongation, and arrhythmia) and electrolyte/fluid balance conditions (hypokalaemia, hyponatremia).

Management: There is no specific antidote. Establish and maintain an airway, ensure adequate oxygenation and respiratory function. Gastric lavage and the use of activated charcoal should be considered. Gastric lavage should be carried out as soon as possible after oral ingestion. Cardiac and vital signs monitoring are recommended along with general symptomatic supportive measures. ECG monitoring is advised in case of overdose, in patients with congestive heart failure/bradyarrhythmias, in patients using concomitant medications that prolong the QT-interval, or in patients with altered metabolism, e.g. liver impairment.

Therapeutic Class

SSRIs & related anti-depressant drugs

Storage Conditions

Store below 30°C temperature and protect from light & moisture. Keep the medicine out of the reach of children.