
Arcalion 10S
Serdia Pharmaceuticals India Pvt Ltd - 10 S
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Piribedil 50 mg (prolonged/long-acting release) tablet
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Trivastal L.A 50 Tablet is used for parkinson’s disease (as monotherapy or adjunct to levodopa) to help control symptoms such as tremor, rigidity and slowness of movement; may also be used for certain circulatory/vascular disorders as per physician advice.
Medically reviewed by Dr. Balaji Krishnan, MBBS · Updated September 2026
Trivastal L.A 50 Tablet contains Piribedil 50 mg (prolonged/long-acting release) tablet. It belongs to the Dopamine agonist class of medicines.
Piribedil is a dopamine agonist that stimulates dopamine receptors in the brain, helping improve motor control in Parkinson’s disease. It also has alpha-2 adrenergic antagonist activity, which may contribute to improved blood flow and symptom relief in some patients.
Take as prescribed by the doctor. Swallow the long-acting tablet whole with water; do not crush or chew. Usually taken with or after food to reduce nausea; take at the same time each day.
Take it exactly as your doctor prescribed. Do not change the dose or stop early on your own.
Take the missed dose of Trivastal L.A as soon as you remember. If it is almost time for the next dose, skip the missed one and carry on with the usual schedule. Do not take two doses together to make up for a missed dose.
Taking more Trivastal L.A than prescribed can be harmful. If you suspect an overdose, contact a doctor or go to the nearest emergency department at once, and carry the pack or strip with you. In India the emergency number is 112.
Most side effects of Trivastal L.A are mild and settle as the body adjusts. Reported side effects include:
Stop the medicine and seek help immediately for a rash, swelling of the face or lips, wheezing or difficulty breathing. Tell your doctor about any side effect that persists or worries you.
| Pregnancy | Not recommended / Consult doctor |
|---|---|
| Alcohol | Use with caution (may increase dizziness and drowsiness) |
| Habit forming | No |
Use with caution in elderly patients and those with heart disease, low blood pressure, psychiatric illness (hallucinations/psychosis), or history of impulse-control disorders. May cause sudden sleep episodes; avoid driving/operating machinery if drowsy. Hallucinations and confusion can occur, especially when used with levodopa. Do not stop suddenly without medical advice (risk of symptom worsening).
Levodopa and other dopaminergic drugs (additive effects/hallucinations), antipsychotics (may reduce effect of piribedil), antihypertensives (increased risk of low BP), sedatives/alcohol (increased drowsiness), antiemetics with dopamine antagonist action such as metoclopramide/prochlorperazine (may reduce effect)
Store below 25°C in a dry place, protected from light and moisture. Keep in original blister pack and out of reach of children.

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The information on Trivastal L.A 50 Tablet is compiled from the manufacturer's prescribing information and the sources below, and is reviewed by a registered medical practitioner. It does not replace advice from your own doctor.