Levocet Tablet: Complete Guide to Uses, Dosage, and Safety
Clinical Reference Standards: CDSCO (Central Drugs Standard Control Organisation), Indian Pharmacopoeia (IP) & WHO | Last Updated: September 2026
When to Call Your Doctor IMMEDIATELY
- Difficulty breathing or swallowing
- Swelling of the face, lips, tongue, or throat
- Severe rash or hives
- Rapid or irregular heartbeat
- Seizures
- Severe drowsiness or confusion
- Yellowing of the skin or eyes
If experiencing severe symptoms, call emergency services immediately.
What is letras tablet used for?
Levocetirizine is a non-sedating antihistamine used to treat allergic rhinitis and chronic urticaria. It works by blocking histamine H1 receptors, providing relief from sneezing, runny nose, itchy eyes, and hives. The usual adult dose is 5 mg once daily.
- Generic Name: Levocetirizine (NA)
- Manufacturer: Biostrass Health Sciences Pvt Ltd
- Form: Allopathy
- Pregnancy Category: Consult doctor
- Prescription Required: Yes
🇮🇳 letras tablet के बारे में (Hindi Summary)
उपयोग: यह दवा लेवोसेटिरिज़िन पर आधारित है, जो एक एंटीहिस्टामाइन है। इसका उपयोग एलर्जी राइनाइटिस (नाक की एलर्जी), छींक, बहती नाक, आंखों में खुजली और पानी आना, और पित्ती (हाइव्स) के इलाज के लिए किया जाता है। यह दवा शरीर में हिस्टामाइन नामक पदार्थ को रोककर एलर्जी के लक्षणों को कम करती है। यह आमतौर पर 6 साल से बड़े बच्चों और वयस्कों के लिए उपयोग की जाती है। इस दवा को डॉक्टर के निर्देशानुसार ही लें।
साइड इफेक्ट्स: इस दवा के सामान्य दुष्प्रभावों में नींद आना, थकान, मुंह सूखना और सिरदर्द शामिल हैं। ये आमतौर पर हल्के होते हैं और अपने आप ठीक हो जाते हैं। कभी-कभी पेट दर्द, जी मिचलाना या दस्त भी हो सकते हैं। गंभीर दुष्प्रभाव दुर्लभ हैं, लेकिन अगर आपको चकत्ते, खुजली, चेहरे, होंठ, जीभ या गले में सूजन, या सांस लेने में कठिनाई हो, तो तुरंत डॉक्टर से संपर्क करें।
सुरक्षा सलाह: इस दवा को डॉक्टर के बताए अनुसार ही लें। अपनी मर्जी से मात्रा न बढ़ाएं। इस दवा से नींद आ सकती है, इसलिए वाहन चलाने या मशीनरी चलाने से बचें जब तक कि आपको पता न चल जाए कि यह दवा आप पर कैसे असर करती है। इस दवा के साथ शराब न लें। अगर आपको किडनी या लीवर की बीमारी है, तो अपने डॉक्टर को बताएं। गर्भवती या स्तनपान कराने वाली महिलाएं डॉक्टर से सलाह लें। बच्चों की पहुंच से दूर रखें।
💊 letras tablet Uses & Benefits
[{"condition":"Allergic rhinitis","description":"Relieves sneezing, runny nose, itchy and watery eyes, and nasal itching associated with seasonal or perennial allergies.","evidence":"Well-established"},{"condition":"Chronic idiopathic urticaria","description":"Reduces the number and size of hives and relieves itching in patients with chronic hives of unknown cause.","evidence":"Well-established"},{"condition":"Allergic conjunctivitis","description":"Helps relieve itching, redness, and tearing of the eyes due to allergies.","evidence":"Well-established"},{"condition":"Atopic dermatitis","description":"May be used as an adjunct to relieve itching in some patients with eczema.","evidence":"Limited"}]
Off-label uses: [{"condition":"Chronic cough","description":"Sometimes prescribed off-label to relieve cough associated with allergic postnasal drip.","evidence":"Limited"},{"condition":"Anxiety-related insomnia","description":"Rarely used off-label for its sedative effects, but not recommended due to potential side effects.","evidence":"Insufficient"}]
Primary treatment for: Allergic rhinitis
Also treats: Chronic idiopathic urticaria, Allergic conjunctivitis, Atopic dermatitis
📋 Drug Information
| Generic Name(s) | Levocetirizine (NA) |
| Brand Name | letras tablet |
| Manufacturer | Biostrass Health Sciences Pvt Ltd |
| Packaging / Form | Varies by brand (Allopathy) |
| Therapeutic Class | RESPIRATORY |
| Action Class | H1 Antihistaminics (second Generation) |
| Route of Administration | Oral |
| Storage | Store at room temperature between 15°C and 30°C (59°F to 86°F). Protect from moisture and direct sunlight. Keep in the original container. |
| Shelf Life | 24 months from the date of manufacture. |
| WHO Guideline | Not established from the available information. |
| ICMR Guideline | Not established from the available information. |
👨⚕️ Doctor's Practical Tips
Evidence-based practical advice from experienced clinicians
🔍 Is This Medicine Right for Your Symptom?
Educational reference. Always consult a doctor for diagnosis.
🔬 How This Medicine Works (Pharmacology)
Pharmacokinetics
How It Works
Levocetirizine is a selective antagonist of peripheral H1 receptors. It competes with histamine for binding sites on effector cells in the gastrointestinal tract, blood vessels, and respiratory tract. By blocking H1 receptors, it prevents histamine-induced symptoms such as vasodilation, increased vascular permeability, itching, and smooth muscle contraction. Unlike first-generation antihistamines, levocetirizine has limited penetration into the central nervous system, resulting in less sedation.
Mechanism Steps
💡 How to Take letras tablet
Strength: Levocetirizine 5 mg immediate-release tablet.
Dosage Information
| Adult Dosage | The usual adult dose of this medicine is 5 mg once daily in the evening. For allergic rhinitis, the dose may be taken during the day if drowsiness is not a problem. For chronic urticaria, the same dose is used. Dose must be individualized by a qualified clinician based on indication, age, weight, renal and hepatic function. Do not exceed the recommended dose. |
| Pediatric Dosage | Pediatric dosing is not established from available information. Consult a pediatrician. |
| Elderly Dosage | Elderly patients (above 65 years) may be more sensitive to the side effects of this medicine, especially drowsiness. Dose adjustment may be necessary based on renal function. Consult your doctor for appropriate dosing. |
| Renal Impairment | In patients with renal impairment, the dose should be adjusted based on creatinine clearance. For mild renal impairment (CrCl 50-80 mL/min), the usual dose may be used. For moderate impairment (CrCl 30-50 mL/min), 5 mg every other day is recommended. For severe impairment (CrCl 10-30 mL/min), 5 mg twice weekly is recommended. For patients with CrCl less than 10 mL/min or on dialysis, this medicine is contraindicated. |
| Hepatic Impairment | No dose adjustment is needed for patients with mild to moderate hepatic impairment. In severe hepatic impairment, caution is advised, and dose adjustment may be necessary based on clinical response. |
| Maximum Daily Dose | 5 mg per day for adults and children above 12 years. For children 6-11 years, the maximum dose is 2.5 mg per day. |
Dosage Timeline
🍽️ Food Timing Guide
⏰ What to Do If You Miss a Dose
⚠️ Side Effects of letras tablet
✅ Common Side Effects
🚨 Serious Side Effects
⚠️ Rare Side Effects
Consult your doctor if you experience any unusual symptoms.
🔬 Drug Interactions
| Drug | Severity | Effect |
|---|---|---|
| Alcohol | Major | |
| Benzodiazepines | Major | |
| Opioids | Major | |
| Ritonavir | Moderate | |
| Theophylline | Moderate | |
| Antacids | Minor |
🚨 Major Interactions
- Alcohol
- CNS depressants (e.g., benzodiazepines, opioids, sedatives)
⚡ Moderate Interactions
- Ritonavir
- Theophylline
🍷 Alcohol Interaction
Alcohol should be avoided while taking this medicine because it can increase drowsiness and impair your ability to drive or operate machinery. The combination may also increase the risk of other side effects.
🔎 Check Your Other Medicines
Educational tool. Always confirm with your doctor or pharmacist.
🛡️ Safety & Warnings
🚫 Contraindications
["Hypersensitivity to levocetirizine, cetirizine, or any component of the formulation","Severe renal impairment (creatinine clearance less than 10 mL/min)","Patients on dialysis","Children under 6 years of age (for this formulation)"]
⚠️ Warnings & Precautions
["May cause drowsiness; avoid driving or operating machinery until you know how it affects you.","Avoid alcohol and other CNS depressants.","Use with caution in patients with renal impairment; dose adjustment may be needed.","Use with caution in patients with liver disease.","Not recommended for children under 6 years of age.","Elderly patients may be more sensitive to the side effects, especially drowsiness.","Do not exceed the recommended dose."]
🤱 Lactation Safety
Levocetirizine is excreted in human breast milk. Because of the potential for adverse reactions in nursing infants, a decision should be made whether to discontinue nursing or to discontinue the drug, taking into account the importance of the drug to the mother.
💊 Overdose Management
Symptoms of overdose may include drowsiness, agitation, restlessness, and in severe cases, seizures. If you suspect an overdose, seek immediate medical attention. Treatment is symptomatic and supportive. There is no specific antidote. Hemodialysis does not effectively remove levocetirizine from the body.
⏰ 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
Take this medicine exactly as prescribed by your doctor. Do not exceed the recommended dose. Avoid driving or operating heavy machinery until you know how this medicine affects you, as it may cause drowsiness. Avoid consuming alcohol while taking this medicine, as it can increase drowsiness and impair your ability to concentrate. Inform your doctor if you have kidney or liver disease, as dose adjustments may be needed. Do not use this medicine for longer than prescribed without consulting your doctor. If you are pregnant, planning to become pregnant, or breastfeeding, consult your doctor before taking this medicine. Keep this medicine out of reach of children. Store it at room temperature, away from moisture and direct sunlight.
👴 Special Considerations for Elderly
💡 For Patients Above 65
Elderly patients may be more sensitive to the side effects of this medicine, especially drowsiness and dry mouth. Dose adjustment may be necessary based on renal function. Regular monitoring of kidney function is advised. Consult your doctor for appropriate dosing.
🤰 Pregnancy Planning (TTC)
If you are planning to become pregnant, consult your doctor before taking this medicine. Levocetirizine is classified as Pregnancy Category B, but it should be used during pregnancy only if clearly needed. Your doctor will weigh the benefits and risks.
🏥 Post-Surgery Considerations
This medicine may cause drowsiness and should be used with caution after surgery. Inform your surgeon and anesthesiologist that you are taking this medicine. It may interact with other medications used during surgery, such as sedatives and pain relievers.
🦷 Dental Procedures
Inform your dentist that you are taking this medicine before any dental procedure. It may cause dry mouth, which can increase the risk of dental problems. Your dentist may recommend frequent sips of water or sugar-free gum to alleviate dry mouth.
💚 Lifestyle Tips for Better Results
🏋️ Exercise Considerations
This medicine may cause drowsiness in some individuals. Avoid strenuous exercise or activities that require alertness until you know how this medicine affects you. If you experience dizziness or fatigue, rest and consult your doctor.
🥗 Diet Recommendations
💼 Impact on Daily Work & Life
This medicine may cause drowsiness, which can affect your ability to drive or operate machinery. It is advisable to avoid such activities until you know how the medicine affects you. If your work requires alertness, discuss with your doctor about taking the dose at bedtime. The medicine should not affect your overall work performance once you understand its effects on you.
🛑 When to Stop This Medicine
Do not stop taking this medicine without consulting your doctor. If you experience severe side effects or your symptoms improve, your doctor may adjust or stop the treatment. Abrupt discontinuation is not associated with withdrawal symptoms, but it is best to follow your doctor's advice.
📅 Long-Term Use Effects
Long-term use of this medicine is generally safe when taken as prescribed. However, regular monitoring of kidney function may be advised in patients with renal impairment. Tolerance to the antihistaminic effect does not develop. If you experience any unusual symptoms, consult your doctor. Periodic review of the need for continued therapy is recommended.
🌿 Non-Medicine Approaches
These can complement medicine but do not replace prescribed treatment.
Identifying and avoiding allergens can reduce the need for medication.
Evidence: Well-establishedRinsing the nasal passages with saline can help relieve nasal congestion and allergy symptoms.
Evidence: Well-establishedAllergy shots or sublingual tablets can desensitize the immune system over time.
Evidence: Well-established💉 Vaccination Considerations
💉 If You're Getting Vaccinated
This medicine does not interact with vaccines. You can receive vaccinations while taking this medicine. However, if you are scheduled for allergy testing, inform your doctor, as antihistamines may interfere with skin test results.
📦 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
When traveling, carry this medicine in its original packaging along with a copy of your prescription. Store it at room temperature and protect it from moisture and direct sunlight. If you are crossing time zones, continue taking your dose at the same time each day as prescribed. Check local customs regulations regarding carrying prescription medicines. Always keep your medicine in your carry-on luggage to avoid loss or exposure to extreme temperatures.
💰 Cost Analysis & Savings
👥 Real Patient Stories
Educational, anonymized scenarios. Individual results may vary.
💬 Questions Patients Often Ask
A: This medicine usually starts working within 1 hour after taking a dose.
A: Yes, it can be taken daily as prescribed by your doctor for chronic conditions like allergic rhinitis or urticaria.
A: Consult your doctor before combining with other antihistamines, as it may increase side effects.
A: 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.
A: Do not stop taking this medicine without consulting your doctor, especially if you have been taking it for a long time.
🤔 Common Patient Concerns
🔄 Substitutes for letras tablet
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Medical Note: Always consult your doctor before switching medications.
🛑 Myths vs. Facts
- Myth: Levocetirizine is a steroid.
Fact: Levocetirizine is an antihistamine, not a steroid. It does not cause steroid-related side effects. - Myth: Levocetirizine can be taken for a common cold.
Fact: Levocetirizine is effective for allergic symptoms but not for the common cold, which is usually caused by viruses. - Myth: Levocetirizine causes weight gain.
Fact: Levocetirizine is not associated with weight gain. Some antihistamines may increase appetite, but this is not common with levocetirizine. - Myth: Levocetirizine is habit-forming.
Fact: Levocetirizine is not habit-forming and does not cause dependence.
🔄 Alternative Options
Generic Alternatives
- Levocetirizine 5 mg tablet
Brand Alternatives
- Levocet 5 mg tablet
- Levocetirizine 5 mg tablet (various brands)