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Nelfinavir: Brands, Price & Uses in Bangladesh
Nelfinavir is an HIV-1 protease inhibitor indicated, in combination with other antiretroviral agents, for the treatment of HIV-1 infection.
About Nelfinavir
Indications of Nelfinavir
Nelfinavir is an HIV-1 protease inhibitor indicated, in combination with other antiretroviral agents, for the treatment of HIV-1 infection.
Evidence-based classification of use
- Established/FDA-approved use: Treatment of HIV-1 infection in adults and pediatric patients (2 years of age and older), always as part of a combination antiretroviral regimen with at least two other antiretroviral agents. Nelfinavir must never be used as monotherapy.
- Guideline status: Current HIV treatment guidelines (e.g., DHHS/WHO) no longer list Nelfinavir as a preferred or alternative first-line agent because of the availability of protease inhibitors and other antiretroviral classes with better tolerability, lower pill burden, and fewer food/interaction restrictions. Nelfinavir may still be used in select, guideline-directed circumstances (for example, in patients already virologically suppressed on it, or where other agents are unsuitable), under specialist supervision.
- Combination-only agent: Efficacy depends entirely on combining Nelfinavir with other active antiretroviral drugs; it is not effective and is not indicated as a standalone therapy.
All use of Nelfinavir should be directed by a physician experienced in the management of HIV infection.
Dosage & Administration of Nelfinavir
Adult Dose
| Regimen | Dose |
|---|---|
| Standard dosing | 1250 mg (two 625 mg tablets) orally twice daily, taken with food |
| Alternative dosing | 750 mg (three 250 mg tablets) orally three times daily, taken with food |
Pediatric Dose (2 years and older)
Dosing is weight-based, using tablets or oral powder, taken with food:
- Approximately 45-55 mg/kg orally twice daily, or 25-35 mg/kg orally three times daily, not to exceed the adult dose.
- Safety and efficacy in children under 2 years of age have not been established.
Administration Notes
- Always take Nelfinavir with a meal or light snack to maximize absorption.
- Nelfinavir must always be used in combination with other antiretroviral agents, never as monotherapy.
- Doses should not be skipped, doubled, or discontinued without medical advice, as this can lead to viral resistance.
Renal/Hepatic Adjustment
No dosage adjustment is required in renal impairment. Nelfinavir has not been well studied in significant hepatic impairment; use with caution and close monitoring in patients with liver disease, as increased exposure may occur.
Side Effects of Nelfinavir
Common
- Diarrhea (the most common adverse effect, often dose-related)
- Nausea, flatulence, abdominal pain
- Rash
- Headache, fatigue
Less Common but Clinically Important
- Hyperglycemia and new-onset or worsening diabetes mellitus
- Elevated liver transaminases
- Fat redistribution/accumulation (lipodystrophy) with long-term use
- Increased bleeding episodes in patients with hemophilia A or B
- Immune reconstitution inflammatory syndrome (in patients with advanced HIV starting combination antiretroviral therapy)
Patients should promptly report severe or persistent diarrhea, signs of high blood sugar, unusual bleeding, or jaundice to their physician.
Contraindications of Nelfinavir
- Known hypersensitivity to Nelfinavir or any component of the formulation.
- Co-administration with drugs that are highly dependent on CYP3A4 for clearance and for which elevated plasma concentrations are associated with serious or life-threatening reactions, including certain ergot derivatives (e.g., ergotamine, dihydroergotamine), cisapride, pimozide, midazolam, triazolam, certain statins (lovastatin, simvastatin), amiodarone, quinidine, and sildenafil when used for pulmonary arterial hypertension.
- Co-administration with rifampin or proton pump inhibitors, which significantly reduce Nelfinavir plasma concentrations and risk therapeutic failure and resistance.
- Co-administration with strong CYP3A4 inducers such as St. John's Wort, due to loss of virologic response.
See Interactions for the clinical rationale behind each contraindicated combination.
Frequently Asked Questions about Nelfinavir
What is Nelfinavir used for?
Nelfinavir is an HIV protease inhibitor used, in combination with other antiretroviral medicines, to treat HIV-1 infection. It is never used alone.
How should I take Nelfinavir?
Take Nelfinavir exactly as prescribed by your physician, with food, at the same times each day, together with your other antiretroviral medicines. Do not skip, double, or stop doses without medical advice, as this can lead to drug resistance.
Can I take Nelfinavir with antacids or acid-reducing medicines?
No. Proton pump inhibitors and other agents that reduce stomach acid significantly lower Nelfinavir absorption and are contraindicated with Nelfinavir. Tell your doctor about all medicines you take, including over-the-counter and herbal products.
Is Nelfinavir safe during pregnancy?
Nelfinavir should be used in pregnancy only as part of a physician-directed antiretroviral regimen, when the benefit of preventing mother-to-child HIV transmission and treating the mother outweighs potential risk to the fetus. Always consult your physician before use during pregnancy or while breastfeeding.
What are the common side effects of Nelfinavir?
The most common side effect is diarrhea. Other effects include nausea, abdominal discomfort, rash, and, with long-term use, changes in blood sugar, blood fats, and body fat distribution. Report severe or persistent symptoms to your doctor.
What should I do if I miss a dose or take too much Nelfinavir?
If you miss a dose, take it as soon as you remember unless it is close to the next dose; do not double up. If you or someone else has taken too much Nelfinavir, seek immediate medical attention or contact a poison control center right away.
Disclaimer
The information provided is accurate to the best of our knowledge, but it does not replace professional medical advice. We cannot guarantee its completeness or accuracy, and the absence of specific information about a drug should not be taken as an endorsement. We are not responsible for any consequences arising from this information, so please consult a healthcare professional for any concerns or questions.