Raltegravir With Optimized Background Therapy (OBT) in Multiple Experienced HIV-infected Patients

Considering its novel mechanism of action, potency, safety and tolerability, and pharmacokinetic profile, raltegravir has been used in several clinical scenarios. Since its initial clinical use in multiresistant patients throughout the Expanded Access and Compassionate Use Program (started in March 2007) raltegravir has been used successfully in other clinical scenarios, including but not limited to: enfuvirtide-related serious adverse events and intolerance, nucleoside analogue inhibitors' toxicity, ritonavir and protease inhibitor intolerance and to avoid significant drug-drug interactions. Early access to raltegravir was basically focused on patients on therapeutic failure and triple-class resistance and due to enfuvirtide intolerance. In order to achieve a better understanding of the efficacy and safety profile of raltegravir in the clinical setting, it is intended to evaluate retrospectively HIV patients treated in Portugal with raltegravir since the Early Access and Compassionate Use Program (EAP) was implemented.

This is a national, multicenter, observational, clinical cohort study with retrospective collection of data. Each site will include patients who had started treatment with raltegravir under the EAP.

Inclusion criteria

• Male or female patients, aged 18 years or older
• ARV multi-experienced patients (i.e. experienced at least two prior regimens) with need to change current ARV therapy, including:

• HIV-1 infected patients with documented therapeutic failure,
• HIV-2 infected patients with documented therapeutic failure
• HIV infected patients in virologic suppression who needed to change ARV due to inacceptable toxicity, as determined by the investigator, including patients who needed to replace T20
• Raltegravir-naïve patients who initiated raltegravir since the EAP Program, with optimized background therapy(OBT)
• Patient who has been followed at the same clinical site since the start of raltegravir

Exclusion criteria

• Acute or decompensated chronic hepatitis. Patients with serum aminotransferase levels 10 times the upper limit of the normal range or higher (grade 4)
• Patients who presented resistance to drugs included in OBT (namely, etravirine, darunavir or maraviroc)
• Non-existing medical records for viral load and TCD4 at baseline, week 24 and 48