Lopinavir Ritonavir Tablets

Q1: What is Lopinavir/Ritonavir (Ritocom) used for?

Lopinavir/Ritonavir (LPV/r) is a boosted protease inhibitor combination used for HIV-1 treatment. It was previously a standard first-line option globally and remains a key second-line therapy in many HIV programs, particularly in resource-limited settings.

Q2: How does Lopinavir/Ritonavir work?

Lopinavir inhibits HIV protease enzyme, preventing cleavage of the HIV polyprotein into functional viral proteins — halting production of new infectious virions. Ritonavir 100mg inhibits CYP3A4, dramatically increasing Lopinavir blood levels (pharmacokinetic boosting).

Q3: Why must Lopinavir/Ritonavir be taken with food?

Food increases Lopinavir bioavailability by 2–3 fold. Taking on an empty stomach results in subtherapeutic levels, increasing the risk of virological failure and resistance. Always take with a substantial meal.

Q4: What is the standard dosing for Lopinavir/Ritonavir?

400mg Lopinavir/100mg Ritonavir (two tablets) twice daily with food, spaced 12 hours apart. Once-daily dosing (800mg/200mg) is an option for treatment-naive patients without significant resistance mutations.

Q5: What are the most common side effects?

Diarrhea (most common, affects 20–30%), nausea, abdominal pain, elevated cholesterol and triglycerides are most common. Lipid elevations are a class effect of boosted PIs and require monitoring and sometimes statin therapy.

Q6: What serious side effects require emergency care?

Seek immediate care for: pancreatitis (severe abdominal pain, elevated lipase), severe hepatotoxicity (jaundice, right upper quadrant pain), cardiac QT/PR interval prolongation (palpitations, syncope), or severe GI bleeding.

Q7: What are the major drug interactions?

Lopinavir/Ritonavir has extensive CYP3A4 inhibition — major interactions include: contraindicated with lovastatin/simvastatin, rifampicin (major inducer requiring dose adjustment), certain antifungals, antiarrhythmics, PDE5 inhibitors. A comprehensive interaction check with a pharmacist is essential.

Q8: Is it safe to switch from LPV/r to a newer regimen?

Yes, patients stable on LPV/r can switch to modern INSTI-based regimens (Dolutegravir, Bictegravir) for improved tolerability and fewer drug interactions. Switching should be guided by viral load testing and your HIV specialist.

Q9: Can Lopinavir/Ritonavir be used during pregnancy?

LPV/r can be used in pregnancy, but heat-stable tablet formulations maintain better pharmacokinetics than the older liquid formulation. Dosing may need adjustment in the third trimester. Always discuss with your HIV/OB specialist team.

Q10: What monitoring is required during LPV/r therapy?

CD4 count and viral load every 3–6 months. Fasting lipid panel every 6–12 months. Liver function tests at baseline and periodically. Blood glucose monitoring (increased diabetes risk with PI use).

Q11: How should Ritocom be stored?

Store at room temperature below 25°C, away from moisture and light. Keep in original packaging out of reach of children. Do not use after the expiry date.

Q12: Do I need a prescription?

Yes. Lopinavir/Ritonavir is a prescription-only specialist antiretroviral requiring HIV specialist management, drug interaction review, and regular monitoring of lipids, liver function, and viral load.