Lithin SR 400 mg is a slow-release lithium formulation indicated for the treatment and prophylaxis of bipolar disorder, mania, and recurrent depression. It has been a cornerstone in psychiatric therapy for decades, helping to stabilize mood swings and reduce the risk of relapse in patients with bipolar affective disorder. Lithin SR 400 mg offers a controlled release that ensures steady serum lithium levels, improving efficacy while minimizing side effects.

রেজিস্টার্ড চিকিৎসকের পরামর্শ অনুযায়ী ঔষধ সেবন করুন

Therapeutic Class

• Anti-manic drug

Pharmacology

Lithium, the active component, exerts its therapeutic effects through complex interactions in the central nervous system, although the exact mechanism is not fully understood. Its potential mechanisms include:

• Inhibition of glycogen synthase kinase 3 (GSK-3)

• Modulation of inositol phosphatases

• Regulation of glutamate receptor activity

• Alteration of intraneuronal catecholamine metabolism

• Regulation of sodium transport in neurons and muscle cells

These actions collectively stabilize mood, reduce mania, and prevent recurrent depressive episodes. Lithin SR 400 mg is designed for sustained release, which helps maintain consistent blood levels over time.

Indications

Lithin SR 400 mg is indicated for:

• Treatment of acute mania

• Prophylaxis of manic and depressive episodes in bipolar disorder

• Management of recurrent depression

Dosage and Administration

• Adults and children over 12 years:

  • Acute treatment: Initially 1–1.5 g per day

  • Prophylaxis: Initially 300–400 mg per day

• Administration: Should be taken with food to reduce gastrointestinal discomfort

• Special Populations:

  • Renal impairment (CrCl 10–50 mL/min): 50–75% of normal dose

Contraindications

• Renal insufficiency

• Cardiovascular insufficiency

• Addison’s disease

• Untreated hypothyroidism

• Known hypersensitivity to lithium

Side Effects

Common side effects may include:

• Fatigue, tremors, memory problems

• Increased thirst and frequent urination

• Gastrointestinal disturbances: nausea, vomiting, diarrhea, loss of appetite

• Rare neurological effects with prolonged use

  রেজিস্টার্ড চিকিৎসকের পরামর্শ অনুযায়ী ঔষধ সেবন করুন

Precautions and Warnings

• Monitor serum lithium levels regularly to avoid toxicity

• Fluid and electrolyte balance must be maintained, especially during prolonged sweating or diarrhea

• Avoid concomitant use of diuretics or drugs affecting renal function without medical supervision

• Use cautiously in elderly patients and those with renal or cardiovascular conditions

Overdose Management

• Stop lithium immediately

• Monitor serum lithium levels every six hours

• Avoid diuretics

• Initiate osmotic diuresis or urine alkalinization

• For severe toxicity (serum lithium >4.0 mmol/L or deteriorating condition), hemodialysis or peritoneal dialysis is recommended

• Continue monitoring for at least one week for possible rebound lithium levels

Pregnancy & Lactation

• Pregnancy Category D: Increased risk of cardiovascular abnormalities in infants if used during the first trimester; avoid unless essential

• Breastfeeding: Not recommended unless benefits outweigh risks

Storage Conditions

• Store at 25°C in a dry place, away from light and moisture

• Keep out of reach of children

Mode of Action

Lithin SR 400 mg acts on multiple intracellular pathways, including enzyme inhibition and neurotransmitter modulation, stabilizing mood and preventing relapse in patients with bipolar disorder and recurrent depression. Its sustained-release formulation ensures therapeutic levels are maintained for optimal efficacy and tolerability.