The primary objective of this study is to continue to provide Darunavir (DRV) to pediatric patients who previously received DRV in any of three pediatric clinical studies sponsored by Tibotec Pharmaceuticals and continue to benefit from using it, in countries where DRV is not yet commercially available for the pediatric patient, is not reimbursed or cannot be accessed through another source (like access program or government program).

This study has the aim to continue the provision of DRV and rtv to pediatric patients that continue to benefit from treatment with it after participation in any of three ongoing pediatric studies sponsored by Tibotec Pharmaceuticals. In addition, information on the safety of DRV and rtv in combination with other antiretroviral therapies will be assessed. At the baseline visit, inclusion and exclusion criteria will be checked to confirm eligibility. Once eligible, patients will continue treatment either on the once daily dose regimen (when coming from the TMC114-TiDP29-C230 study) or a twice daily regimen (when coming from the TMC114-C212 or TMC114-TiDP29-C228 studies). Assessments and visit frequency will take place as per local standard of care but are desirable every 3 months. The interval between two visits should not exceed 6 months. Pregnancy testing for girls having had their first menses is foreseen. In addition, it is desirable that testing includes efficacy assessments (immunology and plasma viral load) and laboratory safety assessments (hematology, biochemistry including pancreatic amylase (if available) or lipase and lipid analysis). Serious Adverse Events and certain selected Adverse Events will be collected. Treatment will be continued until one of the following criteria is met (whichever occurs first): Virologic failure, treatment limiting toxicity, loss to follow-up, withdrawal of consent or assent by the patient or withdrawal of consent by the caregiver, pregnancy, termination of the trial by the sponsor, when Darunavir becomes commercially available, is reimbursed or can be accessed through another source (as there are access program or government program) in the region the patient is living in. The sponsor advises participating centers to plan the study visits every 3 months but frequency will depend on local practice and standard of care. The sponsor has also foreseen in the study protocol a guidance on specific safety assessments to be performed as well as detailed instructions on how to deal with specific toxicities and undesirable effects. However local practice will prevail and the assessments performed may vary depending on the region the patient is participating in. Intake of study medication will happen once daily or twice daily, depending on what the patient took in the original pediatric trial. For the twice daily regimen, the regimen may be adjusted as the patient gains weight. The adult dosage regimen of 600/100 mg DRV/rtv may be administered as of 40 kg of body weight. Depending on the history of the patient, following dosages may be administered: DRV oral suspension (100mg DRV/ml), DRV tablets 75 mg, 150 mg, 600 mg, all for twice daily intake. DRV 400 mg for the once daily 800 mg intake (2 tablets per intake).DRV intake will be combined with rtv in oral suspension (80 mg rtv/ml), capsule or tablet (both 100 mg).

Inclusion Criteria:

• Patient has completed the TMC114-C212, TMC114-TiDP29-C228 or TMC114-TiDP29-C230 study and continues to benefit from DRV
• DRV is not commercially available, not reimbursed or cannot be accessed through another way
• signed informed consent by parents/caregivers or assent by the patient is available prior to inclusion

Exclusion Criteria:

• Any condition or active clinically significant disease (such as pancreas problems or cardiac problems) endangering the patient safety while being enrolled in the study
• Previously demonstrated clinically significant allergy or hypersensitivity to the study medication
• Pregnancy or breastfeeding female patients
• Specific criteria will be applicable for girls having had their first menses and for girls and boys having reached the age of sexual activity