Ketrel

Quetiapine, the active ingredient in Ketrel, is an atypical antipsychotic presented as an oral tablet for oral use. It treats schizophrenia, bipolar I disorder (both manic and depressive episodes) and is used as adjunctive therapy for major depressive disorder in adults.

GNH USA supplies Ketrel as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.

Quetiapine is an atypical antipsychotic that modulates dopamine and serotonin pathways, and is indicated for several psychiatric conditions.

- Schizophrenia: reduces psychotic symptoms and lowers risk of relapse. - Bipolar I disorder (manic episodes): stabilises mood and controls manic symptoms. - Bipolar I disorder (depressive episodes): alleviates depressive symptoms. - Adjunctive treatment of major depressive disorder: enhances response to primary antidepressants.

Quetiapine may cause a range of adverse reactions, from mild to serious. Awareness of common and rare events helps clinicians monitor patients effectively.

Common Side Effects: - Sedation or somnolence - Dizziness or light‑headedness - Dry mouth - Constipation - Weight gain - Orthostatic hypotension

Serious or Rare Side Effects: - Neuroleptic malignant syndrome - Agranulocytosis or severe leukopenia - Tardive dyskinesia - Significant QT‑interval prolongation - Increased suicidal thoughts in young adults - Severe hypotension or cardiovascular collapse

Quetiapine requires careful monitoring for metabolic, cardiovascular and psychiatric safety.

- Metabolic monitoring: regularly assess weight, glucose and lipid levels. - Suicidality assessment: watch for emergence or worsening of suicidal thoughts, especially in younger patients. - Elderly caution: avoid use in dementia‑related psychosis due to increased mortality risk. - Discontinuation: taper gradually to reduce risk of rebound insomnia or agitation. - Hepatic/renal function: adjust use in patients with significant impairment. - Store at room temperature: keep in the original container, protect from moisture and direct sunlight.

Quetiapine interacts with several drug classes; some combinations should be avoided while others need close monitoring.

Major Interactions (Avoid): - Strong CYP3A4 inhibitors (e.g., ketoconazole, clarithromycin): may increase quetiapine levels. - Other antipsychotics: additive CNS effects and QT prolongation. - CNS depressants (alcohol, benzodiazepines): heightened sedation and respiratory depression. - Drugs that prolong QT interval (e.g., certain antiarrhythmics): risk of cardiac arrhythmias. - Monoamine oxidase inhibitors: potential for hypertensive crisis.

Moderate Interactions (Monitor Closely): - CYP3A4 inducers (e.g., rifampin, carbamazepine): may reduce efficacy. - Antihypertensive agents: additive hypotensive effect. - Anticholinergic medications: may worsen dry mouth and constipation. - Lithium: monitor lithium levels for possible toxicity. - Smoking (induction of CYP1A2): may modestly affect plasma concentrations.