Quetiapine

Quetiapine is a atypical (second-generation) antipsychotic medicine available in Bangladesh under many brand names. Below are its uses, side effects and precautions — and every brand with its current price.

Specialists prescribe Quetiapine for:

• Schizophrenia — to treat hallucinations, delusions and disorganised thinking, and to prevent relapse
• Bipolar disorder — manic episodes, bipolar depression and long-term mood stabilisation
• Major depressive disorder — as an add-on to an antidepressant when the response is inadequate (specialist decision)
• Occasionally, severe anxiety or agitation in selected patients under psychiatric supervision

Quetiapine should not be used casually as a sleeping pill. Sedation is a side effect, not a licence for self-medication, and unsupervised use exposes people to weight gain, blood-sugar problems and other avoidable risks.

Side effects to know about:

• Common: drowsiness (often marked), dizziness, dry mouth, constipation, increased appetite, weight gain, a drop in blood pressure on standing
• Metabolic: raised blood sugar, cholesterol and triglycerides over months — the reason periodic blood tests are essential
• Less common: restlessness, tremor, blurred vision, rapid heartbeat, vivid dreams
• Serious (urgent care): high fever with rigid muscles and confusion (neuroleptic malignant syndrome), new involuntary face or tongue movements, fainting, signs of very high blood sugar (excessive thirst and urination), severe allergic reaction, worsening mood with self-harm thoughts

Attend every scheduled review so weight, sugar and lipids can be tracked.

Precautions during Quetiapine treatment:

• Expect sedation — avoid driving and hazardous work until your response is clear, and take the dose at night as advised
• Metabolic monitoring is mandatory: weight, waist, blood sugar and lipids at baseline and periodically; maintain diet and physical activity from the start
• Rise slowly from lying or sitting to avoid dizziness and falls
• Avoid alcohol and unprescribed sedatives
• Elderly people with dementia-related psychosis face increased risks with antipsychotics — use only under specialist judgement
• Tell your doctor about heart disease, low blood pressure, seizures, liver problems, diabetes or cataracts
• Avoid overheating and dehydration in hot weather
• Never stop the medicine abruptly

Key interactions of Quetiapine:

• Strong CYP3A4 inhibitors — ketoconazole, itraconazole, erythromycin, clarithromycin and some antivirals can sharply raise quetiapine levels; such combinations need avoidance or dose changes
• Enzyme inducers — carbamazepine, phenytoin and rifampicin can sharply lower its levels and reduce the effect
• Sedatives and alcohol — additive drowsiness and risk of suppressed breathing
• Blood-pressure medicines — may exaggerate pressure drops on standing
• Other QT-prolonging drugs — additive heart-rhythm risk
• Dopamine-acting drugs (such as levodopa) — mutual interference

Always disclose every medicine — including antibiotics and antifungals started by other doctors — to whoever prescribes Quetiapine.

Quetiapine should not be used in:

• Known allergy to quetiapine or any component of the tablet
• Concurrent use of strong CYP3A4-inhibiting medicines, unless the prescriber specifically manages the combination
• Children and adolescents outside specialist indications and supervision

It requires particular caution — specialist assessment, careful dosing and monitoring — in elderly patients (especially with dementia-related behaviour problems, where antipsychotics increase the risk of stroke and death), in severe heart or liver disease, uncontrolled epilepsy, very low blood pressure, untreated diabetes, and in anyone with a history of neuroleptic malignant syndrome or a severe drug-induced movement disorder.

Pregnancy: Untreated psychosis or bipolar disorder during pregnancy is itself dangerous, so the decision to continue or adjust Quetiapine belongs to the psychiatrist and obstetrician together. Babies exposed in the third trimester may show temporary symptoms after birth — tremor, stiffness or floppiness, sleepiness, feeding or breathing difficulty — so the delivery team must be informed. Never stop the medicine abruptly on learning of pregnancy.

Breastfeeding: Quetiapine passes into breast milk in small amounts. Some mothers breastfeed during treatment under medical supervision, with monitoring of the baby for sedation and feeding problems; the choice depends on the dose, the baby's health and available support. Decide together with your doctor.

Store Quetiapine below 30°C in its original pack, away from light, heat and moisture. Keep it strictly out of the reach of children — even a single tablet can heavily sedate a child — and away from anyone who might misuse it for sleep. Maintain a steady supply so doses are never missed, and carry enough medicine when travelling. Do not use tablets beyond their expiry date or ones that look damaged, and dispose of leftover medicine safely rather than keeping or sharing it.