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Europe - Africa Research Network for Evaluation of Second-line Therapy (EARNEST) Rifabutin Pharmacokinetics (PK) substudy

Toxicity and pharmacokinetics of different Rifabutin doses in HIV-infected adults and adolescents taking lopinavir / ritonavir as second-line anti-retroviral therapy (ART) (EARNEST Rifabutin PK substudy)

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ISRCTN
Registry ID
ISRCTN13074752
Enrollment
140
Registered
2012-04-03
Start date
2012-03-05
Completion date
Unknown
Last updated
2019-05-05

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Human immunodeficiency virus (HIV) / Tuberculosis (TB) Infections and Infestations HIV disease resulting in tuberculosis

Interventions

Patients will be randomised in a ratio of 1:1 to the following two treatment groups: Group 1: rifabutin (150 mg) three times a week (Monday/Wednesday/Friday) Group 2: r

Sponsors

MRC Clinical Trials Unit (UK)
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1. HIV-1 infected adults/adolescents (12 years and older) receiving boosted protease inhibitor (almost exclusively lopinavir/ritonavir, Aluvia) containing second-line ART within the EARNEST trial 2. Enrolled with or developing tuberculosis (TB) during EARNEST trial follow-up 3. Currently receiving or planning to initiate rifabutin-containing anti-TB treatment (ie no contraindications to rifabutin) 4. Who provide written informed consent

Exclusion criteria

Exclusion criteria: 1. Patients who have already reached week 132 in the EARNEST trial at time of TB diagnosis will not be enrolled as practical considerations limit follow up to 12 weeks beyond the completion of the week 144 EARNEST visit. 2. Patients who have less than 10 weeks remaining in their course of TB treatment will not be enrolled as they will not contribute to the main PK evaluation at week 12 (window 10-14 weeks)

Design outcomes

Primary

MeasureTime frame
Grade 3/4 adverse events over the course of the trial and time to first event

Secondary

MeasureTime frame
1. Rifabutin and its 25-o-desacetyl metabolite pharmacokinetic parameters (from a population PK model) 2. Lopinavir/ritonavir pharmacokinetic parameters (from a population PK model) 3. Raltegravir pharmacokinetic parameters (from a population PK model) 4. Response to TB therapy (culture positive at 24 weeks or subsequent relapse/recurrence) 5. Rifamycin resistance

Countries

Uganda

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026