Neivex 250mg Tablet (nelfinavir): 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, dark urine, or severe abdominal pain
- Severe upper abdominal pain radiating to the back with nausea and vomiting
- Blistering rash, peeling skin, or sores in the mouth or eyes
- Rapid breathing, extreme tiredness, or muscle pain with stomach pain
- Unusual bleeding or bruising
- Chest pain, palpitations, or fainting
- Decreased urine output or blood in urine
- High fever with swollen glands or difficulty breathing
If experiencing severe symptoms, call emergency services immediately.
What is nel 250mg tablet used for?
This medicine contains nelfinavir, an antiretroviral medicine used with other drugs to treat HIV-1 infection. It works by blocking the HIV protease enzyme, which the virus needs to make mature infectious particles. It is taken by mouth with food, usually two or three times daily, and must never be used alone.
- Generic Name: Nelfinavir (250mg)
- Manufacturer: Mcneil & Argus Pharmaceuticals Ltd
- Form: Allopathy
- Pregnancy Category: Consult doctor
- Prescription Required: Yes
🇮🇳 nel 250mg tablet के बारे में (Hindi Summary)
उपयोग: यह दवा नेल्फिनाविर नामक एंटीरेट्रोवायरल दवा है, जिसका उपयोग एचआईवी-1 संक्रमण के इलाज के लिए अन्य एंटीरेट्रोवायरल दवाओं के साथ किया जाता है। यह वायरस के प्रोटीज एंजाइम को रोककर काम करती है, जिससे वायरस शरीर में नहीं बढ़ पाता। यह दवा एचआईवी का इलाज नहीं है, लेकिन वायरस की मात्रा को कम करके प्रतिरक्षा प्रणाली को मजबूत बनाने में मदद करती है। इसे हमेशा डॉक्टर की सलाह से ही लेना चाहिए और बीच में बंद नहीं करना चाहिए।
साइड इफेक्ट्स: इस दवा के सामान्य दुष्प्रभावों में दस्त, जी मिचलाना, उल्टी, पेट दर्द और सिरदर्द शामिल हैं। कुछ लोगों में थकान, चकत्ते या खून की जांच में बदलाव भी देखने को मिल सकते हैं। गंभीर दुष्प्रभाव कम होते हैं, लेकिन लीवर की समस्या, अग्नाशयशोथ, गंभीर त्वचा प्रतिक्रिया और अन्य दवाओं के साथ खतरनाक परस्पर क्रिया हो सकती है। कोई भी नया या बिगड़ता लक्षण दिखने पर तुरंत डॉक्टर से संपर्क करें।
सुरक्षा सलाह: इस दवा को डॉक्टर के बताए अनुसार ही लें, खुराक को अपने आप न बदलें और न ही बंद करें। इसे भोजन या हल्के नाश्ते के साथ लें, इससे दवा का अवशोषण बेहतर होता है और पेट की तकलीफ कम होती है। लीवर, ब्लड शुगर और कोलेस्ट्रॉल की नियमित जांच कराते रहें। अपने डॉक्टर को सभी दवाओं, सप्लीमेंट्स और हर्बल उत्पादों के बारे में बताएं। इलाज के दौरान गर्भनिरोधक का उपयोग करें और परिवार नियोजन के बारे में डॉक्टर से बात करें। दवा को ठंडी और सूखी जगह पर, मूल डिब्बे में ही रखें।
💊 nel 250mg tablet Uses & Benefits
[{"condition":"Human immunodeficiency virus type 1 infection","description":"This medicine is used as part of combination antiretroviral therapy to suppress HIV-1 viral load and improve immune function in adults and children.","evidence":"Well-established"}]
Off-label uses: []
Primary treatment for: Human immunodeficiency virus type 1 infection
Also treats: Acquired immunodeficiency syndrome, HIV-associated wasting, Opportunistic infections in advanced HIV
📋 Drug Information
| Generic Name(s) | Nelfinavir (250mg) |
| Brand Name | nel 250mg tablet |
| Manufacturer | Mcneil & Argus Pharmaceuticals Ltd |
| Packaging / Form | Varies by brand (Allopathy) |
| Therapeutic Class | ANTI INFECTIVES |
| Action Class | Protease (HIV) inhibitors |
| Route of Administration | Oral |
| Storage | Store this medicine at room temperature between 15°C and 30°C in a dry place. Keep it in the original container, tightly closed, and protect it from direct sunlight and moisture. |
| Shelf Life | The shelf life of this medicine is typically 24 months from the date of manufacture, but the exact expiry date is printed on the pack. Do not use the tablets after the expiry date. |
| WHO Guideline | World Health Organization guidelines recommend protease inhibitor-based regimens as an option for second-line antiretroviral therapy in adults and children. Nelfinavir is not a preferred first-line agent in current WHO guidelines, and its use should follow national HIV treatment protocols. |
| ICMR Guideline | Indian Council of Medical Research guidelines for HIV care recommend using antiretroviral regimens that are effective and well tolerated. Nelfinavir may be used in specific situations as part of combination therapy, but the choice of regimen should follow the latest national guidelines and specialist advice. |
👨⚕️ 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 is a protease inhibitor that binds to the active site of the HIV-1 protease enzyme. By blocking this enzyme, it prevents the cleavage of viral polyprotein precursors into mature functional proteins. As a result, immature and non-infectious virus particles are produced, which reduces viral replication and lowers the viral load in the blood.
Mechanism Steps
💡 How to Take nel 250mg tablet
Strength: This medicine is available as a 250 mg immediate-release tablet for oral use.
Dosage Information
| Adult Dosage | The usual adult dose of this medicine is 1250 mg taken twice daily, or 750 mg taken three times daily, as part of combination antiretroviral therapy. The dose may be adjusted by the clinician based on the patient's liver function, kidney function, other medicines, and tolerability. Dose must be individualized by a qualified clinician based on indication, age, weight, renal and hepatic function. Do not change the dose without medical advice. |
| Pediatric Dosage | Pediatric dosing is not established from available information. Consult a pediatrician. |
| Elderly Dosage | There is limited information on the use of this medicine in elderly patients. Because liver and kidney function may decline with age, the clinician should assess these functions before starting treatment and adjust the dose if needed. |
| Renal Impairment | Nelfinavir is mainly eliminated in the faeces, so dose adjustment is generally not required for mild to moderate kidney impairment. In severe kidney impairment, the clinician should monitor the patient closely and adjust the dose if necessary. |
| Hepatic Impairment | Nelfinavir is metabolised in the liver. In mild to moderate liver impairment, no dose adjustment is usually needed, but the clinician should monitor liver function closely. In severe liver impairment, the medicine should be used with caution, and the dose may need to be reduced or an alternative medicine chosen. |
| Maximum Daily Dose | The maximum recommended adult daily dose is 2500 mg when taken as 1250 mg twice daily, or 2250 mg when taken as 750 mg three times daily. The exact maximum dose must be determined by the treating clinician. |
Dosage Timeline
🍽️ Food Timing Guide
⏰ What to Do If You Miss a Dose
⚠️ Side Effects of nel 250mg tablet
✅ Common Side Effects
🚨 Serious Side Effects
⚠️ Rare Side Effects
Consult your doctor if you experience any unusual symptoms.
🔬 Drug Interactions
| Drug | Severity | Effect |
|---|---|---|
| Rifampicin | Major | |
| Ergotamine | Major | |
| Midazolam | Major | |
| Simvastatin | Major | |
| Amiodarone | Major | |
| Methadone | Moderate | |
| Oral contraceptives | Moderate | |
| Phenytoin | Moderate | |
| Sildenafil | Moderate | |
| Tacrolimus | Moderate |
🚨 Major Interactions
- Rifampicin
- Ergot derivatives such as ergotamine and dihydroergotamine
- Midazolam and triazolam
- Amiodarone, quinidine, and other antiarrhythmics
- Simvastatin and lovastatin
⚡ Moderate Interactions
- Methadone
- Oral contraceptives
- Phenytoin and carbamazepine
- Sildenafil
- Tacrolimus and cyclosporine
🍷 Alcohol Interaction
Alcohol may worsen liver problems and increase the risk of pancreatitis when taken with this medicine. It is best to avoid alcohol or limit it strictly, and to discuss any alcohol use with your clinician.
🔎 Check Your Other Medicines
Educational tool. Always confirm with your doctor or pharmacist.
🛡️ Safety & Warnings
🚫 Contraindications
["Known allergy to nelfinavir or any ingredient in the tablet","Use with medicines that are highly dependent on CYP3A4 and have a narrow safety margin, such as ergot derivatives, midazolam, triazolam, and certain antiarrhythmics","Use with rifampicin, because it can lead to loss of antiviral effect","Use with St John's wort, because it can reduce nelfinavir levels","Severe liver impairment, unless the clinician decides the benefit outweighs the risk"]
⚠️ Warnings & Precautions
["This medicine must always be used as part of combination antiretroviral therapy, never alone.","Do not stop or change the dose without advice from your HIV clinician.","Tell your clinician about all other medicines, including over-the-counter products and herbal supplements.","Report any new or worsening symptoms, especially yellowing of the eyes or skin, dark urine, or severe stomach pain.","People with diabetes should monitor blood sugar closely, as this medicine can worsen high blood sugar.","People with haemophilia may have an increased risk of bleeding.","This medicine can interact with many drugs, so always check with a pharmacist or clinician before starting anything new.","Use effective contraception during treatment and discuss family planning with your clinician."]
🤱 Lactation Safety
Nelfinavir is excreted in human breast milk in small amounts. In many settings, breastfeeding is not recommended for mothers living with HIV because of the risk of passing the virus to the baby through breast milk. Mothers should follow local guidelines and discuss infant feeding with their HIV care team.
💊 Overdose Management
There is no specific antidote for an overdose of this medicine. If an overdose is suspected, seek emergency medical care immediately. Treatment is supportive and may include monitoring of vital signs, liver function, kidney function, and heart rhythm. Activated charcoal may be considered if the patient presents soon after ingestion, as advised by a clinician.
⏰ Missed Dose
If you miss a dose, take it as soon as you remember if less than half the dosing interval has passed. If more than half the dosing interval has passed, skip the missed dose and continue with your regular schedule. Do not take a double dose to make up for a missed one. If you are unsure, contact your clinician or pharmacist for advice.
Additional Safety Advice
Take this medicine exactly as prescribed by your clinician, and do not change the dose or stop it without medical advice. Swallow the tablet whole with a meal or a light snack to improve absorption and reduce stomach upset. Do not crush or chew the tablet unless your clinician or pharmacist tells you it is safe to do so. Keep all appointments for blood tests, because this medicine can affect the liver, blood sugar, and cholesterol levels. Tell your clinician about all other medicines, supplements, and herbal products you take, because this medicine interacts with many drugs. Use effective contraception during treatment and discuss family planning with your clinician. Do not share this medicine with anyone else, even if they have similar symptoms. Store the tablets in their original container at room temperature, away from moisture and direct sunlight. If you miss a dose, follow the missed dose instructions given by your clinician, and never double the next dose to catch up.
👴 Special Considerations for Elderly
💡 For Patients Above 65
Elderly patients may have reduced liver and kidney function, which can affect how this medicine is handled by the body. They may also be taking other medicines for chronic conditions, increasing the risk of interactions. Close monitoring of liver function, kidney function, and other medicines is recommended.
🤰 Pregnancy Planning (TTC)
If you are planning pregnancy, discuss your HIV treatment with your clinician before conception. This medicine has been used in pregnancy, but the decision to continue or change it should be made by a specialist who can weigh the benefits and risks. Effective viral suppression before and during pregnancy reduces the risk of passing HIV to the baby.
🏥 Post-Surgery Considerations
After surgery, inform your surgical and anaesthetic team about all your medicines, including this one. This medicine can interact with anaesthetic agents and pain medicines. Your HIV clinician should be involved in planning your perioperative care.
🦷 Dental Procedures
Tell your dentist that you are taking this medicine before any dental procedure. This medicine can interact with some medicines used in dentistry, and it may increase the risk of bleeding in people with haemophilia. Good oral hygiene is important to prevent infections.
💚 Lifestyle Tips for Better Results
🏋️ Exercise Considerations
Moderate exercise is generally safe and beneficial while taking this medicine. However, if you experience dizziness, unusual tiredness, or muscle pain, avoid strenuous activity and consult your clinician. People with heart rhythm problems should discuss exercise intensity with their doctor.
🥗 Diet Recommendations
💼 Impact on Daily Work & Life
This medicine may cause tiredness, headache, or stomach upset in some people, which can affect concentration. If you feel dizzy or unwell, avoid driving or operating heavy machinery until you know how the medicine affects you. Most people are able to continue their normal work and daily activities with proper adherence and management of side effects.
🛑 When to Stop This Medicine
Do not stop this medicine on your own. If you experience severe side effects, your clinician may adjust the dose or change the regimen. Stopping suddenly can lead to viral rebound and resistance. Always consult your HIV care team before making any changes.
📅 Long-Term Use Effects
Long-term use of this medicine can lead to changes in body fat distribution, increased blood sugar and cholesterol levels, and liver enzyme abnormalities. Regular monitoring of liver function, blood sugar, and lipids is important. Some patients may develop kidney stones or experience increased bleeding if they have haemophilia. The clinician should review the treatment regimen periodically to ensure it remains effective and well tolerated.
🌿 Non-Medicine Approaches
These can complement medicine but do not replace prescribed treatment.
Medicines such as ritonavir, atazanavir, or darunavir may be used as alternatives in combination regimens.
Evidence: Well-establishedMedicines such as dolutegravir or raltegravir are often preferred in modern first-line regimens.
Evidence: Well-establishedMedicines such as efavirenz or nevirapine may be used in some regimens.
Evidence: Well-established💉 Vaccination Considerations
💉 If You're Getting Vaccinated
People living with HIV should receive recommended vaccines, including influenza, pneumococcal, hepatitis B, and COVID-19 vaccines, as advised by their clinician. Live vaccines may not be safe in people with severely weakened immune systems. Discuss vaccination timing with your HIV care team.
📦 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 cabinet
✅ DO
Keep out of reach of children
❌ DON'T
Do not use after the expiry date
✈️ Traveling with This Medicine
When travelling, carry this medicine in its original packaging with the prescription label clearly visible. Bring a copy of your prescription and a letter from your clinician stating that you are carrying antiretroviral medicines for personal use. Carry enough supply for the entire trip plus extra in case of delays. Store the tablets at room temperature and protect them from extreme heat, cold, and moisture. If you cross time zones, ask your clinician how to adjust the timing of your doses to maintain steady levels. Keep the medicine in your hand luggage rather than checked baggage.
💰 Cost Analysis & Savings
👥 Real Patient Stories
Educational, anonymized scenarios. Individual results may vary.
💬 Questions Patients Often Ask
A: This medicine starts reducing the virus within days, but a measurable drop in viral load is usually seen within a few weeks. The full benefit depends on taking it consistently with other antiretroviral medicines.
A: Yes, this medicine should be taken with a meal or light snack. Food improves absorption and reduces stomach upset.
A: If less than half the dosing interval has passed, take the missed dose as soon as you remember. If more than half has passed, skip it and continue your regular schedule. Do not double dose.
A: No. Stopping this medicine can cause the virus to rebound and become resistant. Always consult your HIV clinician before making any changes.
A: No, this medicine does not cure HIV. It controls the virus and helps the immune system recover, but it must be taken lifelong as part of combination therapy.
🤔 Common Patient Concerns
🔄 Substitutes for nel 250mg tablet
View AllAlternative brands with exact same active ingredient:
Medical Note: Always consult your doctor before switching medications.
🛑 Myths vs. Facts
- Myth: This medicine can cure HIV infection.
Fact: This medicine does not cure HIV. It reduces the amount of virus in the body and must be taken lifelong as part of combination therapy. - Myth: I can stop this medicine once my viral load is undetectable.
Fact: Stopping this medicine can cause the virus to rebound and become resistant. Always consult your clinician before making any changes. - Myth: This medicine can be taken without other HIV medicines.
Fact: This medicine must always be used with other antiretroviral medicines to prevent resistance and control the virus effectively. - Myth: This medicine has no interactions with other drugs.
Fact: This medicine interacts with many medicines, including rifampicin, certain sedatives, and some heart medicines. Always check with your clinician or pharmacist.
🔄 Alternative Options
Generic Alternatives
- Nelfinavir 250 mg tablet
Brand Alternatives
- Neivex 250mg tablet