Entavir 1mg Tablet (Entecavir): Complete Medicine Guide
Clinical Reference Standards: CDSCO (Central Drugs Standard Control Organisation), Indian Pharmacopoeia (IP) & WHO | Last Updated: September 2026
When to Call Your Doctor IMMEDIATELY
- Yellowing of the skin or eyes (jaundice)
- Dark urine or pale stools
- Severe abdominal pain, especially in the upper right side
- Rapid breathing, extreme tiredness, or muscle pain (possible lactic acidosis)
- Decreased urine output or swelling in the legs
- Rash, itching, or swelling of the face, lips, or throat
- Confusion, drowsiness, or difficulty staying awake
- Chest pain or shortness of breath
If experiencing severe symptoms, call emergency services immediately.
What is enteca 1 tablet used for?
This medicine is an antiviral tablet containing entecavir 1 mg, used to treat chronic hepatitis B virus infection. It works by blocking the virus from multiplying in the liver. It is taken once daily, with or without food, and must not be stopped suddenly because it can cause a severe liver flare-up.
- Generic Name: Entecavir (1mg)
- Manufacturer: Sun Pharmaceutical Industries Ltd
- Form: Allopathy
- Pregnancy Category: Consult doctor
- Prescription Required: Yes
🇮🇳 enteca 1 tablet के बारे में (Hindi Summary)
उपयोग: यह दवा एंटेकावीर 1 मिलीग्राम की गोली है, जिसका उपयोग क्रोनिक हेपेटाइटिस बी वायरस संक्रमण के इलाज के लिए किया जाता है। यह वायरस को लीवर में बढ़ने से रोकती है और लीवर को नुकसान से बचाती है। यह दवा लीवर सिरोसिस और लीवर कैंसर के खतरे को कम करने में मदद करती है। इसे रोज एक बार खाने के साथ या बिना खाने के लिया जा सकता है। इसे डॉक्टर की सलाह के बिना बंद न करें, क्योंकि अचानक बंद करने से लीवर में गंभीर सूजन हो सकती है।
साइड इफेक्ट्स: इस दवा के आम दुष्प्रभावों में सिरदर्द, थकान, चक्कर आना, जी मिचलाना और दस्त शामिल हैं। ये आमतौर पर हल्के होते हैं और कुछ समय में ठीक हो जाते हैं। कभी-कभी लीवर एंजाइम बढ़ सकते हैं, जिसकी निगरानी डॉक्टर ब्लड टेस्ट से करते हैं। गंभीर दुष्प्रभाव दुर्लभ हैं, लेकिन अगर दवा अचानक बंद कर दी जाए तो लीवर में गंभीर सूजन हो सकती है। अगर आपको सांस लेने में तकलीफ, मांसपेशियों में दर्द, या पेशाब कम आना जैसी समस्या हो तो तुरंत डॉक्टर से मिलें।
सुरक्षा सलाह: इस दवा को डॉक्टर के बताए अनुसार ही लें। इसे अपने आप बंद न करें, क्योंकि इससे हेपेटाइटिस बी फिर से भड़क सकता है और लीवर को नुकसान हो सकता है। इसे रोज एक ही समय पर लें। अगर आपको किडनी की समस्या है तो डॉक्टर को बताएं, क्योंकि डोज बदलनी पड़ सकती है। अपने डॉक्टर को अन्य सभी दवाओं, सप्लीमेंट्स और हर्बल उत्पादों के बारे में बताएं। गर्भवती होने, गर्भधारण की योजना बनाने या स्तनपान कराने से पहले डॉक्टर से सलाह लें। हेपेटाइटिस बी को दूसरों में फैलने से रोकने के लिए सेक्स के दौरान कंडोम का इस्तेमाल करें।
💊 enteca 1 tablet Uses & Benefits
- [{"condition":"Chronic hepatitis B virus infection","description":"This medicine is used to treat chronic hepatitis B in adults and children aged 2 years and older with active viral replication and evidence of liver inflammation or fibrosis.
- It helps suppress the virus and reduce liver damage.","evidence":"Well-established"},{"condition":"Compensated and decompensated cirrhosis due to hepatitis B","description":"This medicine is used in people with hepatitis B-related cirrhosis to slow disease progression and reduce the risk of liver complications.","evidence":"Well-established"},{"condition":"Prevention of hepatitis B recurrence after liver transplant","description":"This medicine may be used to prevent the hepatitis B virus from returning after a liver transplant, often in combination with other medicines.","evidence":"Established"}]
Off-label uses: [{"condition":"HIV and hepatitis B co-infection","description":"This medicine has activity against HIV but should not be used alone for HIV treatment because resistance can develop quickly. It may be used as part of a combination regimen in some cases.","evidence":"Limited"},{"condition":"Prevention of hepatitis B reactivation during chemotherapy or immunosuppressive therapy","description":"This medicine may be prescribed to prevent hepatitis B flare-ups in people receiving chemotherapy or medicines that suppress the immune system.","evidence":"Established"}]
Primary treatment for: Chronic hepatitis B virus infection
Also treats: Compensated cirrhosis due to hepatitis B, Decompensated cirrhosis due to hepatitis B, Prevention of hepatitis B recurrence after liver transplant
📋 Drug Information
| Generic Name(s) | Entecavir (1mg) |
| Brand Name | enteca 1 tablet |
| Manufacturer | Sun Pharmaceutical Industries Ltd |
| Packaging / Form | Varies by brand (Allopathy) |
| Therapeutic Class | ANTI INFECTIVES |
| Action Class | Nucleoside/nucleotide reverse transcriptase inhibitors (NRTIs) |
| Route of Administration | Oral |
| Storage | Store this medicine at room temperature between 15°C and 30°C (59°F to 86°F). Keep it in the original container, tightly closed, and protect it from light and moisture. Do not store it in the bathroom. Keep out of reach of children and pets. |
| Shelf Life | The shelf life of this medicine is typically 24 months from the date of manufacture. Check the expiry date on the pack before use. Do not use it after the expiry date. |
| WHO Guideline | The World Health Organization recommends entecavir as a first-line treatment for chronic hepatitis B in adults and adolescents, and as a preferred option for children aged 2 years and older. WHO guidelines emphasize the importance of long-term treatment and monitoring. |
| ICMR Guideline | The Indian Council of Medical Research (ICMR) guidelines recommend entecavir as a first-line antiviral for chronic hepatitis B. It is considered effective and safe for long-term use, with regular monitoring of viral load and liver function. |
👨⚕️ 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
This medicine works by interfering with the replication of the hepatitis B virus. After entering the body, it is converted inside cells into an active form that competes with the natural building blocks the virus needs to make its DNA. By blocking three different steps in the viral replication process, this medicine stops the virus from multiplying and reduces the amount of virus in the blood. This helps the liver to heal and lowers the risk of long-term liver damage.
Mechanism Steps
💡 How to Take enteca 1 tablet
Strength: This medicine is available as a 1 mg immediate-release tablet for oral administration.
Dosage Information
| Adult Dosage | The usual adult dose of this medicine is 1 mg taken orally once daily for chronic hepatitis B in people with normal kidney function. For people with kidney problems, the dose may need to be reduced or the interval between doses increased. The dose must be individualized by a qualified clinician based on indication, age, weight, renal and hepatic function. Do not change your dose without consulting your doctor. |
| Pediatric Dosage | Pediatric dosing is not established from available information for this specific 1 mg tablet. For children aged 2 years and older, the dose is usually calculated based on body weight and is available in a different formulation. Consult a pediatrician or liver specialist for appropriate dosing. |
| Elderly Dosage | Elderly patients may have reduced kidney function, which can affect how this medicine is eliminated from the body. Your doctor may adjust the dose based on your kidney function. Regular monitoring of kidney function is recommended in elderly patients. |
| Renal Impairment | This medicine is eliminated by the kidneys, so dose adjustments are required in people with reduced kidney function. For people with a creatinine clearance below 50 mL/min, the dose or dosing interval should be adjusted. Your doctor will determine the appropriate dose based on your kidney function tests. |
| Hepatic Impairment | No dose adjustment is needed for people with liver impairment, as this medicine is not significantly metabolized by the liver. However, people with advanced liver disease should be monitored closely for liver flare-ups if the medicine is stopped. |
| Maximum Daily Dose | The maximum recommended daily dose of this medicine is 1 mg once daily for adults with normal kidney function. Higher doses are not recommended. |
Dosage Timeline
🍽️ Food Timing Guide
⏰ What to Do If You Miss a Dose
⚠️ Side Effects of enteca 1 tablet
✅ Common Side Effects
🚨 Serious Side Effects
⚠️ Rare Side Effects
Consult your doctor if you experience any unusual symptoms.
🔬 Drug Interactions
| Drug | Severity | Effect |
|---|---|---|
| Tenofovir disoproxil fumarate | Major | |
| Adefovir dipivoxil | Major | |
| Ibuprofen | Moderate | |
| Cyclosporine | Moderate | |
| Probenecid | Moderate | |
| Antacids (aluminum/magnesium) | Minor |
🚨 Major Interactions
- Tenofovir disoproxil fumarate
- Adefovir dipivoxil
⚡ Moderate Interactions
- Ibuprofen and other NSAIDs
- Cyclosporine
- Probenecid
🍷 Alcohol Interaction
Alcohol can worsen liver damage and may increase the risk of liver problems in people with hepatitis B. It is best to avoid alcohol completely while taking this medicine. If you drink alcohol, talk to your doctor about safe limits.
🔎 Check Your Other Medicines
Educational tool. Always confirm with your doctor or pharmacist.
🛡️ Safety & Warnings
🚫 Contraindications
["Known hypersensitivity or allergy to entecavir or any ingredient in this medicine","Not recommended for use in children below 2 years of age","Should not be used as monotherapy in people with HIV co-infection who are not on fully suppressive HIV therapy"]
⚠️ Warnings & Precautions
["Severe liver flare-ups can occur if this medicine is stopped suddenly. Do not stop without your doctor's advice.","Lactic acidosis and severe liver enlargement with fatty liver have been reported with medicines in this class. Report symptoms such as rapid breathing, extreme tiredness, or muscle pain.","Kidney function should be monitored, especially in people with kidney disease or those taking other kidney-toxic medicines.","This medicine does not prevent the spread of hepatitis B to others. Use barrier protection during sex and do not share needles.","If you have HIV infection, this medicine should not be used alone because HIV resistance can develop. Your doctor will test you for HIV before starting treatment.","This medicine may cause dizziness. Avoid driving or operating machinery until you know how it affects you.","Tell your doctor if you are pregnant, planning to become pregnant, or breastfeeding.","Do not share this medicine with anyone else, even if they have the same condition."]
🤱 Lactation Safety
It is not known whether this medicine passes into breast milk. Because many medicines are excreted in breast milk, and because of the potential for serious side effects in nursing infants, a decision should be made whether to discontinue nursing or to discontinue the medicine, taking into account the importance of the medicine to the mother. Consult your doctor before breastfeeding.
💊 Overdose Management
There is limited information on overdose with this medicine. If you suspect an overdose, seek immediate medical attention. Treatment should be supportive and symptomatic. Because this medicine is removed by the kidneys, hemodialysis may be considered in cases of significant overdose, but its effectiveness in this situation is not well established.
⏰ Missed Dose
If you miss a dose of this medicine, 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 take two doses at the same time to make up for a missed dose.
Additional Safety Advice
Take this medicine exactly as prescribed by your doctor. Do not stop taking it without talking to your doctor first, because stopping suddenly can cause a serious flare-up of hepatitis B that may damage the liver. This medicine is usually taken once daily, with or without food, but try to take it at the same time each day. If you have kidney problems, your doctor may adjust your dose. Tell your doctor about all other medicines, supplements, and herbal products you are taking, because some can interact with this medicine. Do not share this medicine with anyone else, even if they have the same condition. Keep all follow-up appointments and get your blood tests done regularly as advised. If you are pregnant, planning to become pregnant, or breastfeeding, talk to your doctor before taking this medicine. Use condoms or other barrier methods during sex to prevent spreading hepatitis B to others. Make sure your close contacts are vaccinated against hepatitis B.
👴 Special Considerations for Elderly
💡 For Patients Above 65
Elderly patients may have reduced kidney function, which can affect how this medicine is eliminated. Your doctor may adjust the dose based on your kidney function. Regular monitoring of kidney function is recommended. Elderly patients may also be more prone to dizziness and falls; take precautions while moving around.
🤰 Pregnancy Planning (TTC)
If you are planning to become pregnant, talk to your doctor before conception. This medicine should be used during pregnancy only if the potential benefit justifies the potential risk. Your doctor may consider switching to a different antiviral that is considered safer during pregnancy, such as tenofovir. Do not stop or change your medicine without medical advice.
🏥 Post-Surgery Considerations
If you are undergoing surgery, inform your surgeon and anesthesiologist that you are taking this medicine. Do not stop taking it unless your doctor advises you to. Your doctor may monitor your liver and kidney function more closely after surgery.
🦷 Dental Procedures
Inform your dentist that you are taking this medicine. There are no specific precautions for dental procedures, but maintaining good oral hygiene is important. If you need dental surgery, your dentist may consult with your doctor.
💚 Lifestyle Tips for Better Results
🏋️ Exercise Considerations
Moderate exercise is generally safe while taking this medicine. However, if you experience fatigue, dizziness, or muscle pain, avoid strenuous activities and consult your doctor. Stay well hydrated during exercise.
🥗 Diet Recommendations
💼 Impact on Daily Work & Life
This medicine may cause dizziness or fatigue in some people. Avoid driving or operating heavy machinery until you know how it affects you. Most people can continue their normal daily activities while taking this medicine. If your job involves shift work, try to take your medicine at the same time each day.
🛑 When to Stop This Medicine
Do not stop taking this medicine without consulting your doctor. Stopping suddenly can cause a severe flare-up of hepatitis B. Your doctor will decide when it is safe to stop based on your viral load, liver function, and overall health. If you experience severe side effects, contact your doctor immediately.
📅 Long-Term Use Effects
Long-term use of this medicine is generally safe and well-tolerated. It effectively suppresses the hepatitis B virus and reduces the risk of liver cirrhosis and liver cancer. Regular monitoring of liver and kidney function is important. Some people may develop resistance to this medicine over time, though it is less common than with older antivirals. Do not stop the medicine without your doctor's advice, as it can cause a severe flare-up.
🌿 Non-Medicine Approaches
These can complement medicine but do not replace prescribed treatment.
Another first-line antiviral for chronic hepatitis B. It is also highly effective but may have different side effects, especially on the kidneys and bones.
Evidence: Well-establishedAn injectable medicine that boosts the immune system to fight hepatitis B. It is used for a finite duration but has more side effects and is less effective in some people.
Evidence: EstablishedAn older antiviral that is effective but has a high risk of viral resistance. It is rarely used as a first-line treatment now.
Evidence: Established💉 Vaccination Considerations
💉 If You're Getting Vaccinated
People with chronic hepatitis B should be vaccinated against hepatitis A if they are not already immune. Hepatitis B vaccination is recommended for close contacts and family members. Other routine vaccines, such as influenza and pneumococcal vaccines, are also recommended. Live vaccines should be avoided if you are on immunosuppressive therapy, but this medicine is not immunosuppressive.
📦 Storage Guide
✅ DO
Store at room temperature between 15°C and 30°C.
❌ DON'T
Do not refrigerate unless specified.
✅ DO
Keep in the original container, tightly closed.
❌ DON'T
Do not transfer to unmarked containers.
✅ DO
Keep away from direct sunlight and moisture.
❌ DON'T
Do not store in the bathroom.
✅ DO
Keep out of reach of children and pets.
❌ DON'T
Do not use after the expiry date.
✈️ Traveling with This Medicine
When traveling, carry this medicine in its original packaging with a copy of your prescription. Keep it in your carry-on luggage to avoid loss or temperature extremes. Store it at room temperature and protect it from direct sunlight. If you are crossing time zones, continue taking your medicine at the same time each day according to your home schedule, or adjust gradually as advised by your doctor. Carry enough supply for your entire trip, plus extra in case of delays. Check customs regulations for carrying prescription medicines in your destination country.
💰 Cost Analysis & Savings
👥 Real Patient Stories
Educational, anonymized scenarios. Individual results may vary.
💬 Questions Patients Often Ask
A: This medicine starts reducing the hepatitis B virus in your blood within a few weeks, but it may take several months to see the full benefit. Your doctor will monitor your viral load and liver function regularly.
A: This medicine suppresses the hepatitis B virus but does not cure the infection. Most people need long-term treatment to keep the virus under control.
A: Stopping this medicine suddenly can cause a severe flare-up of hepatitis B, which can damage your liver. Always consult your doctor before stopping.
A: Some medicines can interact with this medicine. Always tell your doctor about all other medicines, supplements, and herbal products you are taking.
A: This medicine should be used during pregnancy only if the potential benefit justifies the potential risk. Consult your doctor if you are pregnant or planning to become pregnant.
🤔 Common Patient Concerns
🔄 Substitutes for enteca 1 tablet
View AllAlternative brands with exact same active ingredient:
-
entarica 1mg tabletFibrica Healthcare Pvt Ltd ₹729.65 50.4% CHEAPER
-
baraclude 1mg tabletBMS India Pvt Ltd ₹1,184.33 19.4% CHEAPER
-
austavir 1mg tabletCare Formulation Labs Pvt Ltd ₹1,225.00 16.7% CHEAPER
-
entavir 1mg tabletCipla Ltd ₹1,240.85 15.6% CHEAPER
-
entaliv 1mg tabletDr Reddy's Laboratories Ltd ₹2,331.42 58.6% COSTLIER
Medical Note: Always consult your doctor before switching medications.
🛑 Myths vs. Facts
- Myth: This medicine can cure hepatitis B completely.
Fact: This medicine suppresses the hepatitis B virus but does not cure the infection. Treatment is usually long-term. - Myth: I can stop taking this medicine once I feel better.
Fact: Stopping this medicine suddenly can cause a severe liver flare-up. Always consult your doctor before stopping. - Myth: This medicine can be taken for any type of hepatitis.
Fact: This medicine is only effective against hepatitis B virus. It does not work for hepatitis A, C, or E. - Myth: This medicine is safe to take during pregnancy without any risk.
Fact: This medicine should be used during pregnancy only if the potential benefit justifies the potential risk. Consult your doctor.
🔄 Alternative Options
Generic Alternatives
- Entecavir 1 mg tablet
Brand Alternatives
- Entavir 1mg Tablet