peridon plus 4 mg/2 mg tablet - Risperidone (4mg) + Trihexyphenidyl (2mg) medicine

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🏭 Reliance Formulation Pvt Ltd 📦 Varies by brand 💊 Allopathy 📅 Updated: Sep 23, 2026
📋 Prescription Required 💊 Generic Available
Medically Reviewed
11 min read
Evidence: Well-established for schizophrenia and bipolar mania; limited for off-label uses.
Reviewed by
SaathiMed Expert Panel | Sep 23, 2026

When to Call Your Doctor IMMEDIATELY

  • High fever with severe muscle stiffness and confusion
  • Uncontrollable movements of tongue, face, or limbs
  • Irregular or rapid heartbeat
  • Severe allergic reaction with swelling of face, lips, or throat
  • Yellowing of skin or eyes, dark urine
  • Severe dizziness or fainting
  • Difficulty urinating or severe constipation

If experiencing severe symptoms, call emergency services immediately.

What is peridon plus 4 mg/2 mg tablet used for?

This medicine is a combination of Risperidone (an antipsychotic) and Trihexyphenidyl (an anticholinergic) used to treat schizophrenia and bipolar mania, and to prevent drug-induced movement symptoms. It is taken orally as prescribed by a psychiatrist.

  • Generic Name: Risperidone (4mg) + Trihexyphenidyl (2mg)
  • Manufacturer: Reliance Formulation Pvt Ltd
  • Form: Allopathy
  • Pregnancy Category: Consult doctor
  • Prescription Required: Yes

🇮🇳 peridon plus 4 mg/2 mg tablet के बारे में (Hindi Summary)

उपयोग: यह दवा रिसपेरिडोन और ट्राइहेक्सीफेनिडाइल का संयोजन है। इसका उपयोग सिज़ोफ्रेनिया और बाइपोलर मैनिया के इलाज में किया जाता है। यह मतिभ्रम, भ्रम और आंदोलन को कम करने में मदद करती है। साथ ही, यह दवा से होने वाले मांसपेशियों में अकड़न, कंपन और बेचैनी को भी कम करती है। यह दवा केवल मनोचिकित्सक की सलाह से लेनी चाहिए।

साइड इफेक्ट्स: आम दुष्प्रभावों में नींद आना, चक्कर आना, मुँह सूखना, धुंधली दृष्टि, कब्ज और वजन बढ़ना शामिल हैं। गंभीर दुष्प्रभावों में मांसपेशियों में अकड़न, तेज बुखार, भ्रम, अनियमित दिल की धड़कन और न्यूरोलेप्टिक मैलिग्नेंट सिंड्रोम शामिल हैं। यदि आपको जीभ, चेहरे या अंगों में अनियंत्रित हरकतें दिखें, तो तुरंत डॉक्टर से संपर्क करें।

सुरक्षा सलाह: इस दवा को हमेशा अपने मनोचिकित्सक के बताए अनुसार ही लें। गोली को चबाएं नहीं, पूरा निगल लें। जब तक आपको पता न चले कि यह दवा आप पर कैसा असर करती है, तब तक वाहन न चलाएं और मशीनरी न चलाएं। शराब न पिएं। नियमित फॉलो-अप कराएं। दवा अचानक बंद न करें। इसे कमरे के तापमान पर, धूप और नमी से दूर रखें।

💡 Did You Know? The Indian pharmaceutical market is expected to reach $130 billion by 2030.

💊 peridon plus 4 mg/2 mg tablet Uses & Benefits

  • [{"condition":"Schizophrenia","description":"Helps reduce hallucinations, delusions, disorganised speech, and agitation.
  • The trihexyphenidyl component manages drug-induced movement symptoms.","evidence":"Well-established"},{"condition":"Bipolar mania","description":"Used as an adjunct to mood stabilisers to control acute manic episodes with psychotic features.","evidence":"Well-established"},{"condition":"Drug-induced extrapyramidal symptoms","description":"Trihexyphenidyl treats or prevents tremors, rigidity, and dystonia caused by antipsychotic medications.","evidence":"Well-established"}]

Off-label uses: [{"condition":"Treatment-resistant aggression in dementia","description":"Sometimes used off-label, but carries significant risk in elderly patients and is generally avoided.","evidence":"Limited"},{"condition":"Tourette syndrome","description":"Risperidone may be used off-label for tics, but the combination with trihexyphenidyl is not standard.","evidence":"Limited"}]

Primary treatment for: Schizophrenia

Also treats: Bipolar mania, Drug-induced extrapyramidal symptoms

📋 Drug Information

Generic Name(s)Risperidone (4mg) + Trihexyphenidyl (2mg)
Brand Nameperidon plus 4 mg/2 mg tablet
ManufacturerReliance Formulation Pvt Ltd
Packaging / FormVaries by brand (Allopathy)
Therapeutic ClassNEURO CNS
Action Class
Route of AdministrationOral
StorageStore at room temperature (15-30°C) in a dry place, away from direct sunlight and moisture. Keep in the original container.
Shelf Life24 months from the date of manufacture.
WHO GuidelineNot established from the available information.
ICMR GuidelineNot established from the available information.

👨‍⚕️ Doctor's Practical Tips

Evidence-based practical advice from experienced clinicians

1
Take this medicine at the same time each day to maintain steady levels.
2
Avoid driving or operating machinery until you know how this medicine affects you.
3
Do not drink alcohol while taking this medicine.
4
Report any unusual movements of the tongue, face, or limbs to your doctor immediately.
5
Keep all follow-up appointments for monitoring of side effects and dose adjustment.
6
Do not stop this medicine abruptly; always consult your doctor first.

🔍 Is This Medicine Right for Your Symptom?

Educational reference. Always consult a doctor for diagnosis.

Hallucinations
This medicine is commonly prescribed for this.
Likely Use
Delusions
This medicine is commonly prescribed for this.
Likely Use
Tremors
Trihexyphenidyl component helps with this.
Likely Use
Fever
This medicine is not a primary fever reducer.
Not Primary

🔬 How This Medicine Works (Pharmacology)

Pharmacokinetics

AbsorptionRisperidone is well absorbed after oral administration, with peak plasma levels reached in about 1 to 2 hours. Trihexyphenidyl is also well absorbed from the gastrointestinal tract, with peak levels in 1 to 2 hours.
DistributionRisperidone distributes widely in the body and crosses the blood-brain barrier. Trihexyphenidyl also crosses the blood-brain barrier and is distributed to various tissues.
Protein BindingRisperidone is about 90% bound to plasma proteins, mainly albumin and alpha-1 acid glycoprotein. Trihexyphenidyl is approximately 80% bound to plasma proteins.
MetabolismRisperidone is extensively metabolised in the liver by CYP2D6 to 9-hydroxyrisperidone, which has similar activity. Trihexyphenidyl is metabolised in the liver by unknown enzymes.
Half-LifeRisperidone: about 3 hours for the parent drug and 24 hours for the active metabolite. Trihexyphenidyl: approximately 3.3 hours.
ExcretionRisperidone and its metabolites are excreted mainly in urine and to a lesser extent in faeces. Trihexyphenidyl is excreted in urine as unchanged drug and metabolites.
BioavailabilityRisperidone oral bioavailability is about 70%. Trihexyphenidyl oral bioavailability is approximately 80%.
Onset of ActionAntipsychotic effects may take several days to weeks to fully manifest. Anticholinergic effects of trihexyphenidyl begin within 1 to 2 hours.
Peak Plasma TimeRisperidone: 1 to 2 hours. Trihexyphenidyl: 1 to 2 hours.
Duration of ActionRisperidone: 24 hours or more for antipsychotic effect. Trihexyphenidyl: 6 to 12 hours for anticholinergic effect.

How It Works

Risperidone blocks dopamine D2 receptors and serotonin 5-HT2A receptors in the brain, which helps reduce psychotic symptoms. Trihexyphenidyl works by blocking acetylcholine in the central nervous system, restoring the balance between dopamine and acetylcholine, thereby reducing extrapyramidal symptoms.

Mechanism Steps

1
Risperidone blocks D2 receptors: By blocking dopamine D2 receptors in the mesolimbic pathway, risperidone reduces hallucinations and delusions.
2
Risperidone blocks 5-HT2A receptors: Serotonin 5-HT2A blockade helps reduce negative symptoms and lowers the risk of extrapyramidal symptoms compared to typical antipsychotics.
3
Trihexyphenidyl blocks muscarinic receptors: By blocking acetylcholine in the striatum, trihexyphenidyl corrects the dopamine-acetylcholine imbalance caused by risperidone, relieving tremors and rigidity.

💡 How to Take peridon plus 4 mg/2 mg tablet

Strength: Tablet containing Risperidone 4 mg and Trihexyphenidyl 2 mg.

1Take this medicine at the same time each day.
2Swallow the tablet whole with a glass of water.
3Do not crush, chew, or break the tablet.
4You can take it with or without food, but taking it with food may reduce stomach upset.
5If you miss a dose, follow the missed dose instructions.
6Do not stop taking this medicine without consulting your doctor.

Dosage Information

Adult DosageThe dose of this medicine is individualised by a qualified clinician based on the indication, age, weight, renal and hepatic function, and response to treatment. It is typically taken once or twice daily. Do not adjust the dose without medical advice. Dose must be individualized by a qualified clinician based on indication, age, weight, renal and hepatic function.
Pediatric DosagePediatric dosing is not established from available information. Consult a pediatrician.
Elderly DosageElderly patients are more sensitive to the effects of this medicine. Start with a lower dose and titrate slowly. Use with caution due to increased risk of falls, sedation, and anticholinergic effects.
Renal ImpairmentDose adjustment may be needed in renal impairment. Consult your doctor for individualised dosing.
Hepatic ImpairmentDose adjustment may be needed in hepatic impairment. Consult your doctor for individualised dosing.
Maximum Daily DoseThe maximum daily dose is determined by the prescribing clinician based on individual patient factors. Do not exceed the prescribed dose.

Dosage Timeline

🌅 Morning ❌ ☀️ Afternoon ❌ 🌆 Evening ❌ 🌙 Night ❌

🍽️ Food Timing Guide

With food
Take with meals
Reduces stomach upset.
Grapefruit
Avoid
May increase drug levels.
Alcohol
Avoid
Increases drowsiness and dizziness.

⏰ What to Do If You Miss a Dose

📌 Less than half the dosing interval has passed
→ Take the missed dose as soon as you remember.
💡 Continue with the regular schedule.
📌 More than half the dosing interval has passed
→ Skip the missed dose.
💡 Do not double dose to catch up.

⚠️ Side Effects of peridon plus 4 mg/2 mg tablet

✅ Common Side Effects

Drowsiness (Common (10-20%))
Avoid driving. Usually improves with time. Consult doctor if persistent.
Dry mouth (Common (10-20%))
Sip water, chew sugar-free gum. Consult doctor if severe.
Blurred vision (Common (5-10%))
Usually temporary. Avoid driving until vision clears.
Constipation (Common (5-10%))
Increase fibre and fluids. Consult doctor if no relief.
Weight gain (Common (10-20%))
Monitor weight and diet. Consult doctor for advice.

🚨 Serious Side Effects

Neuroleptic malignant syndrome (Rare (<0.1%))
Seek immediate medical attention if you have high fever, severe muscle stiffness, confusion, or irregular pulse.
Tardive dyskinesia (Uncommon (1-2%))
Report any uncontrollable movements of tongue, face, or limbs to your doctor immediately.
Severe allergic reaction (Rare (<0.1%))
Seek emergency help if you have swelling of face, lips, throat, or difficulty breathing.
Irregular heartbeat (Rare (<0.1%))
Seek immediate medical attention if you feel palpitations or faint.

⚠️ Rare Side Effects

Blood disorders
Report unusual bruising or bleeding to your doctor.
Liver problems
Report yellowing of eyes or skin, dark urine, or abdominal pain.

Consult your doctor if you experience any unusual symptoms.

🔬 Drug Interactions

Drug Severity Effect
Warfarin Moderate
Fluoxetine Moderate
Carbamazepine Moderate
Alcohol Major
Benzodiazepines Major
Anticholinergics Major
Levodopa Moderate
Metoclopramide Moderate
Amiodarone Major
Rifampicin Moderate

🚨 Major Interactions

  • CNS depressants (e.g., alcohol, benzodiazepines, opioids)
  • QT-prolonging drugs (e.g., amiodarone, sotalol, methadone)
  • Anticholinergic drugs (e.g., benztropine, diphenhydramine, oxybutynin)

⚡ Moderate Interactions

  • CYP2D6 inhibitors (e.g., fluoxetine, paroxetine, bupropion)
  • CYP3A4 inducers (e.g., carbamazepine, rifampicin, St. John's wort)
  • Antihypertensive drugs

🍷 Alcohol Interaction

Avoid alcohol while taking this medicine. Alcohol can increase drowsiness, dizziness, and difficulty concentrating, and may worsen the sedative effects of both risperidone and trihexyphenidyl.

🔎 Check Your Other Medicines

Educational tool. Always confirm with your doctor or pharmacist.

🛡️ Safety & Warnings

🚫 Contraindications

["Hypersensitivity to risperidone, trihexyphenidyl, or any component","Uncontrolled narrow-angle glaucoma","Urinary retention","Severe liver or kidney disease","History of tardive dyskinesia","Elderly patients with dementia-related psychosis"]

⚠️ Warnings & Precautions

["May cause drowsiness; avoid driving or operating machinery until effects are known.","Avoid alcohol and other CNS depressants.","May cause orthostatic hypotension; rise slowly from sitting or lying position.","Monitor for neuroleptic malignant syndrome and tardive dyskinesia.","Use with caution in patients with heart disease, seizures, or Parkinson's disease.","Do not stop abruptly; taper under medical supervision.","May increase risk of falls in elderly patients."]

🤱 Lactation Safety

Risperidone and trihexyphenidyl may pass into breast milk. Consult your doctor before breastfeeding. Monitor infant for drowsiness or poor feeding.

💊 Overdose Management

Overdose may cause severe drowsiness, rapid heartbeat, low blood pressure, and extrapyramidal symptoms. Seek emergency medical help immediately. Treatment is supportive and symptomatic. There is no specific antidote.

⏰ Missed Dose

If you miss a dose, take it as soon as you remember. If it is almost time for your next dose, skip the missed dose and continue with your regular schedule. Do not double the dose to catch up.

Additional Safety Advice

General Safety

Always take this medicine exactly as prescribed by your psychiatrist. Do not crush or chew the tablet; swallow it whole with water. Avoid driving or operating heavy machinery until you know how this medicine affects you, as it can cause drowsiness and blurred vision. Do not drink alcohol while taking this medicine, as it can worsen drowsiness and dizziness. Keep all follow-up appointments so your doctor can monitor your response and adjust the dose if needed. Inform your doctor if you have glaucoma, prostate problems, heart disease, or a history of seizures. Do not stop this medicine suddenly, as withdrawal symptoms or relapse can occur. Store it at room temperature, away from moisture and direct sunlight. Keep it out of reach of children.

👴 Special Considerations for Elderly

💡 For Patients Above 65

Elderly patients are more sensitive to the effects of this medicine. Use with caution due to increased risk of falls, sedation, confusion, and anticholinergic effects. Dose adjustment is often needed.

🤰 Pregnancy Planning (TTC)

If you are planning pregnancy, consult your doctor before conception. This medicine may not be suitable during pregnancy. Your doctor will weigh the benefits and risks and may switch to a safer alternative.

🏥 Post-Surgery Considerations

Inform your surgeon and anaesthesiologist that you are taking this medicine. It may interact with anaesthetic agents and affect recovery. Do not stop the medicine without medical advice before surgery.

🦷 Dental Procedures

Inform your dentist that you are taking this medicine. It can cause dry mouth, which may increase the risk of dental problems. Regular dental check-ups are recommended.

💚 Lifestyle Tips for Better Results

🏃
Maintain a healthy weight through diet and exercise.
🥗
Avoid alcohol and recreational drugs.
😴
Get adequate sleep and maintain a regular sleep schedule.
💧
Practice stress-reduction techniques like meditation or yoga.
🧘
Stay socially active and engaged in activities you enjoy.
🌞
Take your medicine at the same time every day.

🏋️ Exercise Considerations

Avoid strenuous exercise or activities requiring alertness until you know how this medicine affects you. Drowsiness and dizziness may increase the risk of falls. Light to moderate exercise is generally safe.

🥗 Diet Recommendations

Eat a balanced diet rich in fruits, vegetables, and whole grains.
Limit intake of high-fat and high-sugar foods to manage weight.
Stay well hydrated to reduce constipation and dry mouth.
Include fibre-rich foods to prevent constipation.

💼 Impact on Daily Work & Life

This medicine can cause drowsiness and dizziness, which may affect your ability to drive or operate machinery. Avoid these activities until you know how the medicine affects you. It may also affect concentration; discuss with your doctor if your work requires high alertness.

🛑 When to Stop This Medicine

Do not stop this medicine without consulting your doctor. Your doctor will decide when and how to taper the dose based on your condition and response to treatment. Abrupt discontinuation can cause withdrawal symptoms or relapse.

📅 Long-Term Use Effects

Long-term use may cause tardive dyskinesia, weight gain, metabolic changes, and hormonal effects. Regular monitoring of weight, blood sugar, lipids, and movement disorders is recommended. Periodic assessment of the need for continued treatment is advised.

🌿 Non-Medicine Approaches

These can complement medicine but do not replace prescribed treatment.

Cognitive behavioural therapy

Can complement medicine for schizophrenia and bipolar disorder.

Evidence: Well-established
Psychosocial rehabilitation

Helps improve social and occupational functioning.

Evidence: Well-established

💉 Vaccination Considerations

💉 If You're Getting Vaccinated

No specific vaccine interactions are established. However, consult your doctor before receiving any vaccine while on this medicine.

📦 Storage Guide

✅ DO

Store at room temperature (15-30°C)

❌ DON'T

Do not refrigerate unless specified

✅ DO

Keep in original container

❌ DON'T

Do not transfer to unmarked containers

✅ DO

Keep away from direct sunlight

❌ DON'T

Do not store in bathroom cabinet

✈️ Traveling with This Medicine

Carry this medicine in its original packaging with a copy of your prescription. Keep it in your hand luggage to avoid loss. Store at room temperature and protect from extreme heat or moisture. If crossing time zones, adjust dosing times gradually under medical advice. Check customs regulations for controlled substances before travelling internationally.

💰 Cost Analysis & Savings

👥 Real Patient Stories

Educational, anonymized scenarios. Individual results may vary.

👤 A 32-year-old man with schizophrenia
He was started on this medicine after experiencing hallucinations and tremors from a previous antipsychotic. Within a few weeks, his hallucinations reduced, and the tremors improved significantly. He was advised to avoid alcohol and to rise slowly from sitting to prevent dizziness.
💡 Lesson: Combining an antipsychotic with an anticholinergic can improve both psychotic symptoms and movement side effects, but lifestyle adjustments are important.
👤 A 45-year-old woman with bipolar mania
She was prescribed this medicine along with a mood stabiliser. Her manic episodes became less frequent, and she was able to sleep better. She experienced dry mouth and constipation, which were managed with increased fluids and fibre.
💡 Lesson: This medicine can be effective for bipolar mania, but side effects like dry mouth and constipation are common and manageable.

💬 Questions Patients Often Ask

Q: How long does it take to work?

A: Antipsychotic effects may take several days to weeks to fully manifest. Anticholinergic effects begin within 1 to 2 hours.

Q: Can I stop taking this medicine suddenly?

A: No, stopping suddenly can cause withdrawal symptoms or relapse. Always consult your doctor before stopping.

Q: Is it safe to take this medicine during pregnancy?

A: Consult your doctor. Use only if clearly needed under medical supervision.

🤔 Common Patient Concerns

💭 These are the concerns patients most commonly raise

  • Can I take this medicine long-term?
  • Will it affect my kidney function?
  • Can I drive after taking this medicine?
  • Does it interact with my blood pressure medicine?
  • What if I miss a dose?
  • Can I drink alcohol while taking this?

🔄 Substitutes for peridon plus 4 mg/2 mg tablet

View All

Alternative brands with exact same active ingredient:

Medical Note: Always consult your doctor before switching medications.

🛑 Myths vs. Facts

  • Myth: This medicine is addictive.
    Fact: This medicine is not addictive in the traditional sense, but it can cause dependence if stopped abruptly. Always taper under medical supervision.
  • Myth: I can stop taking this medicine once I feel better.
    Fact: Stopping suddenly can cause relapse or withdrawal symptoms. Always consult your doctor before stopping.
  • Myth: This medicine will cure my mental illness permanently.
    Fact: This medicine manages symptoms but does not cure the underlying condition. Long-term treatment may be needed.

🔄 Alternative Options

Generic Alternatives

  • Risperidone + Trihexyphenidyl combination (generic)

Brand Alternatives

  • Sizodon Forte Tablet

📊 Comparison with Similar Medicines

[{"medicine":"Risperidone alone","difference":"Does not contain trihexyphenidyl; may require separate anticholinergic if EPS occurs."},{"medicine":"Olanzapine + Trihexyphenidyl","difference":"Olanzapine has different side effect profile, more metabolic effects."},{"medicine":"Haloperidol + Trihexyphenidyl","difference":"Haloperidol is a typical antipsychotic with higher risk of EPS."}]

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