Efficacy Safety Study Comparing 2 Doses of NVP After Initiating Rifampin-containing TB Therapy

The HIV Netherlands Australia Thailand Research Collaboration

Status and phase

Completed

Phase 2

Conditions

Tuberculosis

HIV Infections

Treatments

Drug: HAART containing nevirapine

Study type

Interventional

Funder types

Other

Identifiers

NCT00476853

HIV-NAT 033

Details and patient eligibility

About

A 48 week, randomized, open-label, two arm study to compare the efficacy, safety and tolerability of HAART containing nevirapine 400 mg/day versus nevirapine 600 mg/day in HIV-1 infected patients started at 2-6 weeks after initiating rifampicin containing antituberculosis therapy.

Full description

Preliminary data from the HIVNAT PK laboratory indicate that out of 5/60 patients treated with nevirapine (200 mg bid) and rifampicin had sub-therapeutic nevirapine levels (<3.0 mg mg/L). In a control group of 38 patients using nevirapine without rifampicin there were no sub-therapeutic levels. A dose increase of nevirapine while patients who are receiving that rifampicin may be required. Both nevirapine and rifampicin are tepatotoxic agents as are other agents used in treatment of HIV or tuberculosis. Using a higher nevirapine may prevent the occurrence of sub-therapeutic nevirapine levels, but may also induce more liver toxicity. To address these issues, we designed a randomized prospective study to evaluate the safety, efficacy and pharmacokinetics of nevirapine 400 mg/day versus 600 mg/day with a two weeks lead-in 200 mg/day and 400 mg/day respectively, in TB-HIV co-infected patients who taking rifampicin and short-term efficacy and toxicity.

Enrollment

42 patients

Sex

All

Ages

18 to 60 years old

Volunteers

No Healthy Volunteers

Inclusion criteria

Confirmed HIV positive after voluntary counseling and testing
Aged 18-60 years of age
Antiretroviral treatment naïve.
CD4+ cell count of < 200 cells/mm3 at the time of diagnosed TB
TB is diagnosed and using treatment with rifampin base therapy for at least 2 weeks but no longer than 4 weeks duration. The requirement for study entry is at least one acid-fast bacillus (AFB) positive smear with a typical syndrome and/or CXR findings consistent with pulmonary TB. Pulmonary TB and / or extra pulmonary TB will be included if AFB or culture for TB is positive.
No other active OI (CDC class C event)
Negative pregnancy test in females, and willing to use reliable contraception
Able to provide written informed consent.

Exclusion criteria

The following laboratory variables, i. absolute neutrophil count (ANC) < 1000 cells/uL ii. hemoglobin < 6.5 g/dL iii. platelet count < 50,000 cells/uL iv. serum AST, ALT > 5 x ULN vi. serum bilirubin > 2 x ULN vii. serum creatinine > 2 x ULN viii. Pregnant or nursing mothers.
Current use of steroid and other immunosuppressive agents.
Current use of any prohibited medications related to compliance and drug pharmacokinetics (see appendix )
Acute therapy for serious infection or other serious medical illness (in the judgment of the site Principal Investigator) requiring systemic treatment and/or hospitalization.
Patients with current alcohol or illicit substance use that in the opinion of the site Principal Investigator would conflict with any aspect of the conduct of the trial.
The persons who had been received a mono-therapy of nevirapine
Unlikely to be able to remain in follow-up for the protocol defined period.
Patients with chronic active liver disease.
Patients with proven or suspected acute hepatitis. Patients with chronic viral hepatitis are eligible provided ALT, AST < 5 x ULN.
Karnofsky performance score <30%