Efficacy and Safety to Extend Treatment 24 Weeks in co-Infected HIV-HCV Genotype 1 and/or 4

Inclusion Criteria: * Patients on treatment with Peginterferon alfa-2a (180 µg/week) in combination with Ribavirin (1000-1200 mg/day) who are RNA-HCV undetectable at 44 week * RNA-HCV positive at 48 week before study and genotype 1 or 4. * HIV-1 positive: ELISA y Western-blot. * Stable status of HIV-1 infection in the opinion of the investigator, (patients who are not expected to progress during the study). * Negative urine or blood pregnancy test (for women of childbearing potential) documented within the 24-hour period prior to the first dose of study drug. Additionally, all fertile males and females must be using two forms of effective contraception during treatment and during the 6 months after treatment end. This may include, but is not limited to, using birth control pills, IUDs, condoms, diaphragms, or implants, being surgically sterilized, or being in a post-menopausal state. * Willingness to give written informed consent and willingness to participate to and comply with the study. Exclusion Criteria: * Patients with RNA-HCV detectable after 44 weeks of treatment with Peginterferon alfa-2a (180 µg/week) in combination with Ribavirin (1000-1200 mg/day). * Patients with other treatment for chronic hepatitis, different which of inclusion criteria is described. * More of tree weeks from the end of treatment with Peginterferon alfa-2a (180 µg/week) in combination with Ribavirin (1000-1200 mg/day) to the inclusion in "EXTRADOS" trial.