Trivastal LA
✅ Enhances dopamine function
✅ Alleviates Parkinson’s symptoms
✅ Improves motor function
✅ Reduces rigidity and tremors
✅ Increases mobility
Trivastal LA contains Piribedil.
✓ Medically reviewed by Morgan Ellis — Pharmacy Researcher · 8 years experience · Last reviewed: May 2026
⚡ Quick Answer
Trivastal LA is an oral piribedil (50 mg long-acting) tablet — a non-ergot dopamine agonist used to treat Parkinson disease (and as adjunctive treatment for chronic vascular cognitive symptoms in some markets). It directly stimulates dopamine D2/D3 receptors in the brain, partially substituting for the dopamine that is no longer being made. Piribedil is widely used across Europe and Asia but is less prescribed in the US and UK. It has additional α2 noradrenergic antagonism that may improve attention and cognitive symptoms. Critical safety signals: impulse-control disorders (gambling, hypersexuality, binge eating, compulsive shopping), sudden-onset sleep (sleep attacks while driving), and orthostatic hypotension. Dose must be titrated up slowly and tapered down slowly — never stopped abruptly.
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What Is Trivastal LA?
Trivastal LA is an oral tablet containing piribedil 50 mg long-acting. piribedil is a non-ergot dopamine D2/D3 receptor agonist, originally introduced as Trivastal Retard. Trivastal LA is manufactured by a WHO-GMP certified facility and is bioequivalent to the originator brand at the same strength.
Piribedil is a non-ergot dopamine agonist with mixed pharmacology: it stimulates dopamine D2 and D3 receptors, and additionally antagonises presynaptic alpha2-adrenergic receptors. The alpha2 antagonism may produce mild beneficial effects on attention, cognition and mood that are less prominent with other dopamine agonists. It is widely prescribed across Europe and Asia. It is also sometimes used in vascular cognitive symptoms in older patients, although evidence for this is weaker than for Parkinson disease.
How Does Trivastal LA (piribedil) Work?
Piribedil stimulates dopamine D2 and D3 receptors in the striatum and limbic system, partially substituting for missing dopamine. Distinctively, it also blocks presynaptic alpha2 adrenergic receptors — this de-inhibits noradrenergic neurones and modestly raises noradrenaline release in the prefrontal cortex. The net effect: dopaminergic relief of motor symptoms plus a modest noradrenergic boost on attention and arousal. It does not affect 5-HT2B receptors, so does not cause cardiac valve fibrosis.
Who Is Trivastal LA For?
Trivastal LA is appropriate for adults with Parkinson disease (as monotherapy in early disease or adjunct to levodopa in advanced disease). It is particularly considered in patients with prominent fatigue, poor attention or apathy, where the alpha2 antagonism may help. It is also used (mostly in Europe and Asia) for chronic peripheral arterial circulation problems and adjunctive vascular cognitive symptoms — though Parkinson disease is the principal indication.
Dosing and Titration
Dopamine agonist therapy must be titrated upwards over weeks to avoid intolerable nausea, postural hypotension and somnolence. The dose schedule below is a typical starting framework — your neurologist will tailor it to your response.
| Phase | Dose | Notes |
|---|---|---|
| Initiation (week 1) | 50 mg once daily after a meal | Long-acting tablet, swallowed whole |
| Week 2–3 | 50 mg twice daily | After morning and evening meals |
| Maintenance | 150–250 mg/day in 3–5 divided doses | Always with food |
| Maximum | 300 mg/day | As 6 × 50 mg or per neurologist |
Trivastal LA tablets must be swallowed whole — do not crush, split or chew, as the long-acting matrix would be destroyed and full bioavailability would be released at once, increasing nausea and other side effects. Always take with food — piribedil is one of the most nausea-inducing dopamine agonists when taken on an empty stomach.
Common Side Effects
Common (>10%): nausea, dizziness, somnolence, postural hypotension, peripheral oedema (ankle swelling), constipation, hallucinations (visual more than auditory), dyskinesia (when combined with levodopa).
Less common but serious: sudden-onset sleep, impulse-control disorders, livedo reticularis (mottled skin pattern), vivid dreams, leg oedema, syncope, dyskinesia, hallucinations, paranoia.
Rare: dopamine agonist withdrawal syndrome (DAWS) on rapid taper — depression, anxiety, panic, fatigue, drug craving, autonomic instability. This is the reason agonists must be tapered slowly.
Drug Interactions
- Dopamine antagonists — metoclopramide, prochlorperazine, haloperidol, risperidone, olanzapine: pharmacological antagonism, may worsen Parkinson symptoms. Use domperidone or ondansetron for nausea instead.
- CNS depressants — alcohol, benzodiazepines, opioids, sedating antihistamines: increased somnolence and sleep-attack risk.
- Antihypertensives — additive postural hypotension. Stand up slowly. Monitor blood pressure during titration.
- Levodopa — intentional combination, but may unmask dyskinesia. Lower the levodopa dose if dyskinesia emerges.
- Antiemetic dopamine antagonists — metoclopramide and prochlorperazine antagonise piribedil — use domperidone or ondansetron for nausea. Most other interactions are class effects (CNS depressants, antihypertensives).
Frequently Asked Questions
Can I use Trivastal LA as my only Parkinson medication?
Yes, piribedil is licensed both as monotherapy and as adjunct to levodopa in Parkinson disease. Many patients in countries where it is available start with piribedil monotherapy in early disease; levodopa is added when symptoms progress.
Why does the dose go up so slowly?
Dopamine receptors take days to weeks to adapt. Starting at full dose causes severe nausea, vomiting, dizziness and postural drops. Slow titration lets the brain and gut adjust. Skipping the titration schedule almost always results in stopping the drug because side effects feel intolerable.
Can I stop Trivastal LA abruptly if I dislike it?
No. Sudden withdrawal causes dopamine agonist withdrawal syndrome: depression, anxiety, panic, drug craving and autonomic instability. Even short courses should be tapered over 7–14 days, and longer courses over weeks. Always do this with your neurologist.
What about gambling and other compulsive behaviours?
Approximately 1 in 6 patients on a dopamine agonist develops a new compulsive behaviour — gambling, online shopping, hypersexuality, binge eating. The patient often does not recognise it. Tell a partner or family member to watch for changes. If they appear, contact your neurologist promptly. The behaviour usually reverses with dose reduction.
Is Trivastal LA safe to use long-term?
Yes, with monitoring. Long-term concerns are impulse-control disorders, peripheral oedema, daytime somnolence, and (rarely) hallucinations or psychosis — all manageable with dose adjustment. Unlike ergot agonists (e.g. bromocriptine, pergolide, cabergoline), non-ergot agonists do not cause cardiac valve fibrosis.
Will Trivastal LA cause restless legs syndrome to come back?
Piribedil is not specifically licensed for restless legs syndrome and is less commonly used for that indication than ropinirole or pramipexole. Other non-ergot agonists are preferred for RLS.
Can I drink alcohol on Trivastal LA?
Avoid heavy or regular drinking. Alcohol increases somnolence, sleep-attack risk, postural hypotension and the chance of unmasking impulse-control behaviour. An occasional drink with food is usually acceptable; ask your neurologist for individualised advice.
Can I drive while taking Trivastal LA?
Not until you have been on a stable dose for at least 2 weeks and have not experienced any sleep attacks or excessive daytime sleepiness. Even then, if you ever fall asleep without warning, stop driving and tell your neurologist.
What if I miss a dose?
Take it as soon as you remember unless it is close to the next scheduled dose. Do not double up. If you miss several doses in a row, contact your neurologist — you may need to re-titrate from a lower dose to avoid first-dose nausea.
Can Trivastal LA cause swelling of the legs?
Yes. Peripheral oedema (ankle swelling) affects 5–15% of users and is more common in older patients and at higher doses. It is dose-related and usually improves on dose reduction. Diuretics are not very effective; the better fix is reducing or rotating the agonist.
How does MedsBase ship Trivastal LA?
Worldwide shipping in discreet packaging from a WHO-GMP certified manufacturer. Tablets are shipped in original sealed blister packs. Track your order from your MedsBase account.
Storage
Store at room temperature (15–30°C / 59–86°F), protected from heat, moisture and direct light. Keep in the original container with the lid tightly closed. Keep out of reach of children. Do not use beyond the expiry date printed on the packaging.
Medical Disclaimer
This information is provided for educational purposes only and is not a substitute for the advice of a qualified clinician. Parkinson disease and parkinsonian syndromes require individualised neurology care. Discuss all medications, supplements and pre-existing conditions with your doctor before starting, changing or stopping treatment. Do not abruptly discontinue dopaminergic therapy — sudden withdrawal can precipitate a neuroleptic malignant-like syndrome.
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| Strength | 50 mg |
|---|---|
| Quantity | 30 Tablet/s, 60 Tablet/s, 90 Tablet/s, 180 Tablet/s |
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