Kaletra (Lopinavir 200 mg / Ritonavir 50 mg) — Patient Information (UK)
Kaletra is a prescription antiretroviral medicine used to treat HIV infection. It contains two active ingredients in each dose: lopinavir 200 mg and ritonavir 50 mg. This page explains how Kaletra works, how it is typically taken, important safety information, and practical tips to help you use it more effectively.
Note: HIV treatment must be individualised. Your clinician will select the right combination of medicines for you and monitor your response through regular blood tests.
Basic product information
- Brand name: Kaletra
- Active ingredients: Lopinavir 200 mg and Ritonavir 50 mg
- Medicinal class: Protease inhibitor–based antiretroviral therapy (boosted by ritonavir)
- Common forms: Tablets or oral solution (availability may vary)
- Typical dosing frequency: Often 2 times daily (exact instructions depend on your regimen)
How Kaletra works (mechanism of action)
HIV needs an enzyme called protease to cut long protein strands into smaller pieces that can form new, infectious virus particles. Lopinavir is a protease inhibitor, meaning it blocks HIV protease activity. When the protease is inhibited, immature, non-infectious virus particles are produced, reducing viral replication.
Ritonavir is included in Kaletra at a low “boosting” dose. It helps increase the level of lopinavir in the body by affecting liver enzymes that would otherwise break lopinavir down too quickly. This improves the effectiveness of lopinavir and helps maintain suitable drug levels between doses.
Pharmacokinetics (how the body handles the medicine)
Pharmacokinetics describes what the body does with a medicine—how it is absorbed, distributed, metabolised, and eliminated. While individual responses vary, the following points are important for patients:
- Absorption: Lopinavir/ritonavir is absorbed after taking by mouth. Taking with food is generally recommended because it can improve absorption.
- Metabolism: Both medicines are mainly metabolised by liver enzymes (CYP system), with ritonavir acting as a booster by inhibiting key pathways.
- Elimination: The medicine and its metabolites are cleared primarily through the liver and biliary routes.
- Drug interactions: Because ritonavir affects liver enzymes, interactions with other medicines can be significant—this is one of the most important considerations when using Kaletra.
What Kaletra is used for (indications)
Kaletra is used as part of combination antiretroviral therapy to treat HIV infection. It is typically used for adults and, in some circumstances, children depending on local guidance and patient factors.
It may be chosen when a protease inhibitor–based regimen is appropriate, or when other options are unsuitable due to drug resistance, past treatment history, or specific clinical needs.
Typical treatment approach
HIV treatment usually requires multiple medicines taken together. Kaletra is generally used with other antiretroviral medicines (often from different classes) to improve viral suppression and reduce the risk of resistance.
Dosing and timing
Your prescribed dose and schedule depend on your age, weight (for paediatric use), other medicines, liver function, and treatment history. The information below provides general guidance on timing and adherence.
General timing guidance
- Consistency matters: Try to take Kaletra at the same times each day.
- Follow food advice: Taking with food is important for absorption for many people.
- Do not change the schedule: Do not adjust your dosing interval without clinical advice.
Example schedules (may vary)
Many regimens use twice-daily dosing (every 12 hours). Your clinician may choose once-daily options or alternative schedules depending on the specific product, regimen, and patient factors.
Missed dose
- If you miss a dose, take it as soon as you remember if it is reasonably close to the planned time.
- If it is close to your next dose, skip the missed dose and continue as normal.
- Do not take double doses to make up for a missed one.
If you are unsure, ask your pharmacist for guidance tailored to your dosing schedule.
Food interactions and what to eat
Food can affect how well Kaletra is absorbed. As a result, food timing and meal consistency are important. Most patients are advised to take Kaletra with food (for example, with a meal or snack) to help ensure reliable absorption.
Practical advice
- Take Kaletra with a meal if possible.
- If you usually have a small meal, maintain your usual pattern (avoid sudden major changes).
- If you take the oral solution, follow the preparation and mixing instructions provided with the product.
Grapefruit and similar products
While Kaletra’s interactions are mainly enzyme-related, certain foods and drinks can affect drug levels. Grapefruit and Seville oranges may increase certain drug exposures for some medicines. Check with your pharmacist or clinician for specific dietary guidance.
Alcohol interactions
There is no single “safe” alcohol level that applies to everyone. However, several issues may make alcohol risky during Kaletra treatment:
- Added liver strain: Both HIV and some antiretrovirals can be associated with liver changes. Alcohol may worsen liver stress.
- Metabolism concerns: Alcohol can interact with liver enzyme pathways and may affect overall tolerability.
- Pancreatitis risk: Protease inhibitors (including ritonavir-boosted regimens) have been associated with pancreatitis in some patients. Alcohol can increase the risk of pancreatitis in susceptible individuals.
If you drink alcohol, discuss with your clinician what is safe for you. If you develop severe stomach pain, nausea, or vomiting, seek urgent medical advice.
Medicine interactions (very important)
Kaletra has significant potential for drug interactions, mainly because ritonavir affects drug-metabolising enzymes. This can lead to either: (a) other medicines becoming too high (increasing side effects), or (b) other medicines becoming too low (reducing effectiveness), or (c) Kaletra levels changing.
Medicines that require special caution
Some medicines should be avoided, and others may require dose adjustments and close monitoring. Examples include:
- Anti-arrhythmics (heart rhythm medicines)
- Some anticoagulants (blood thinners)
- Anticonvulsants (seizure medicines)
- Antimycobacterials (TB medicines)
- Certain sedatives and hypnotics
- Some statins (cholesterol medicines) — choice and dosing may need adjustment
- St John’s wort (herbal remedy) — may reduce antiretroviral effectiveness
- Some proton pump inhibitors and acid-reducing medicines — may affect absorption depending on the regimen
This list is not exhaustive. Always tell your pharmacist and clinician about: all prescription medicines, over-the-counter medicines, and herbal products you use (including occasional medicines).
Important interaction check
Before starting Kaletra or any new medicine, you should:
- Share your full medication list
- Ask whether the medicine is safe with lopinavir/ritonavir
- Confirm monitoring needs (blood tests may be required for certain combinations)
Safety profile: side effects and what to watch for
Like all medicines, Kaletra can cause side effects. Not everyone experiences them. Many are mild and improve over time, but some effects require urgent attention.
Common side effects
- Diarrhoea
- Nausea
- Vomiting
- Abdominal discomfort
- Headache
- Rash
- Fatigue
- Increased cholesterol and/or triglycerides (may be detected on blood tests)
Serious or less common risks
- Pancreatitis (watch for severe upper abdominal pain, nausea/vomiting)
- Liver problems (watch for yellowing of eyes/skin, dark urine, severe fatigue)
- Changes in heart rhythm in certain situations (especially with interacting medicines)
- Immune reconstitution inflammatory syndrome (IRIS) in some patients after starting or changing therapy
- Severe skin reactions (seek urgent care if rash becomes severe or blistering occurs)
When to seek urgent help
Contact urgent medical services or seek emergency care if you experience:
- Severe abdominal pain (especially with nausea/vomiting)
- Signs of an allergic reaction (swelling of face/lips, breathing difficulty)
- Yellow eyes/skin or dark urine
- Fainting, severe dizziness, or palpitations
- Severe blistering or widespread rash
Monitoring in clinical practice
Patients on protease inhibitor–based therapy often have periodic monitoring for:
- Viral load and CD4 count
- Liver function tests
- Blood lipids (cholesterol/triglycerides)
- Blood glucose if relevant
- Symptoms suggesting pancreatitis or liver issues
Practical use tips for better outcomes
- Use a routine: Link doses to daily habits (e.g., breakfast and evening meal).
- Keep track: Consider alarms, pill organisers, or phone reminders.
- Take with food: Helps absorption for many patients; follow your specific instructions.
- Do not stop therapy: Stopping or missing doses can allow the virus to rebound and may increase resistance risk.
- Stay hydrated: If diarrhoea occurs, drink fluids and discuss anti-diarrhoeal options with a clinician/pharmacist.
- Check drug interactions: Before starting any new medicine, ask the pharmacist to confirm compatibility.
- Report new symptoms early: Early contact can prevent complications such as dehydration or pancreatitis.
If you experience diarrhoea
Diarrhoea is relatively common. Mild diarrhoea may settle with time. Seek advice promptly if diarrhoea is severe, persistent, or associated with fever, blood in stool, or dehydration.
Alternative options (discuss with your clinician)
HIV treatment is individual. Alternative regimens may include medicines from different classes such as:
- NRTI-based combinations (nucleoside reverse transcriptase inhibitors)
- NNRTI-based combinations (non-nucleoside reverse transcriptase inhibitors)
- Integrase inhibitors (often used in modern first-line regimens due to strong efficacy and convenience)
- Other protease inhibitor options (with different boosting strategies or dosing schedules)
Your clinician will consider factors such as prior resistance, viral load, co-existing conditions, potential interaction risks, pregnancy plans, and convenience.
UK market and legal context
In the UK, antiretroviral medicines such as Kaletra are supplied through regulated channels. Availability, prescribing practice, and patient access pathways are governed by UK healthcare frameworks and the relevant regulatory bodies.
Pharmacies must comply with:
- Medicines regulations and requirements for safe supply
- Good pharmacy practice
- Medicines safety and quality standards
Recent guidance (UK context)
UK HIV guidance continues to emphasise:
- Rapid initiation and durable viral suppression
- Use of regimens based on resistance history and interaction profile
- Regular monitoring for side effects and laboratory changes
Treatment choices may evolve over time as evidence and guideline updates emerge. Your clinic will use the most current recommendations available in the UK.
Delivery and availability (UK)
Availability can vary depending on the formulation (tablets vs oral solution), strength, and stock levels. When ordering online, ensure you select the correct product and strength.
What to expect
- Stock status: Some sizes or formats may be intermittently unavailable.
- Packaging: Medicines are typically supplied in manufacturer packaging with patient information leaflets.
- Delivery times: Delivery options differ by retailer and location within the UK.
- Temperature handling: Follow storage instructions on the label and leaflet.
If you need urgent continuity of treatment, contact the pharmacy or check stock availability before placing an order.
Storage
- Store according to the instructions on the packaging (typically at controlled room temperature).
- Keep out of sight and reach of children.
- Do not use after the expiry date on the box or bottle.
- For oral solution, follow any specific instructions about shaking, refrigeration (if applicable), and discarding after opening.
FAQ
1) What is Kaletra used for?
Kaletra is used as part of combination therapy to treat HIV infection by blocking HIV protease and helping reduce viral replication.
2) How should I take Kaletra?
Take Kaletra exactly as directed by your healthcare team. Many people are advised to take it with food to improve absorption. Try to take doses at consistent times each day.
3) Can I take Kaletra with food and drinks?
Food can affect absorption, so taking with a meal or snack is commonly recommended. For drinks and diet, check with your pharmacist—some items (including certain fruit juices) may affect drug levels.
4) Is alcohol allowed with Kaletra?
Alcohol may increase risk to the liver and could worsen side effects or complicate conditions such as pancreatitis in susceptible people. If you drink alcohol, discuss safe amounts with your clinician or pharmacist.
5) What are the most important interactions?
Interactions can be significant due to ritonavir’s effects on liver enzymes. Always check any new medicine, including over-the-counter medicines and herbal products, with your pharmacist.
6) What if I miss a dose?
Take it as soon as you remember if it’s near the planned time, but if it’s close to your next dose, skip the missed dose. Do not take double doses. If you’re uncertain, ask your pharmacist.
7) What side effects should I watch for?
Common effects include diarrhoea, nausea, and abdominal discomfort. Seek urgent help if you develop severe abdominal pain (possible pancreatitis), signs of liver problems (yellowing skin/eyes), severe rash, or breathing difficulties.
8) Will Kaletra cure HIV?
Kaletra helps control HIV by lowering viral load and maintaining immune function, but it does not cure HIV. Ongoing treatment is typically needed to keep HIV suppressed.
9) Do I still need monitoring if I feel well?
Yes. Viral load, CD4 count, and blood tests for liver function and other safety markers are important even if you feel well.
10) Are there alternatives if Kaletra doesn’t suit me?
Yes. Depending on your situation, clinicians may consider other antiretroviral regimens with different side-effect profiles and fewer interactions. Discuss options with your healthcare team.
Quick reference table
| Topic | Key patient points |
|---|---|
| What it is | Lopinavir 200 mg + Ritonavir 50 mg, boosted protease inhibitor therapy for HIV. |
| How it works | Lopinavir inhibits HIV protease; ritonavir boosts lopinavir levels by affecting metabolism. |
| Typical use | Part of combination antiretroviral therapy to suppress HIV. |
| Timing | Follow your regimen schedule; many regimens are twice daily. Take at consistent times. |
| Food | Taking with food is commonly recommended to support absorption. |
| Alcohol | Use caution—can increase risk for liver-related problems and may worsen tolerability. |
| Interactions | Potentially significant. Check all medicines (including OTC/herbal) for compatibility. |
| Common side effects | Diarrhoea, nausea, abdominal discomfort, headache, rash. |
| Seek urgent help | Severe abdominal pain, signs of liver problems, severe allergic reaction, severe blistering rash. |
Reminder: If you have any questions about how Kaletra fits your treatment plan, or about interactions with your other medicines, speak with a pharmacist or your HIV treatment team.
