Pharmacokinetic Interactions Between Buprenorphine and Tipranavir/Ritonavir (BUTI)
The main purpose of this study is to examine the effect of tipranavir combined with ritonavir, medications for the treatment of HIV-infection, on buprenorphine/naloxone (BUP) in people who have been receiving the same dose of buprenorphine/naloxone for at least 3 weeks before study entry.
|Study Design:||Endpoint Classification: Pharmacokinetics Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Basic Science
|Official Title:||Pharmacokinetic Interactions Between Buprenorphine/Naloxone and Tipranavir/Ritonavir in HIV-Negative Subjects Chronically Receiving Buprenorphine/Naloxone|
- Area Under the Curve of BUP/NLX With TPV/r (h*ng/mL) [ Time Frame: 10 days ] [ Designated as safety issue: No ]Non-compartmental methods were used for pharmacokinetic analysis. The area under the plasma drug concentration-time curve was estimated by linear-log trapezoidal rule at 24-hrs.
|Study Start Date:||May 2006|
|Study Completion Date:||May 2007|
|Primary Completion Date:||May 2007 (Final data collection date for primary outcome measure)|
|Buprenorphine plus Tipranavir/Ritonavir||
Drug: Buprenorphine, Tipranavir and ritonavir
After determining buprenorphine/naloxone pharmacokinetics over a 24-hour period, tipranavir/ritonavir and buprenorphine/naloxone will be coadministered for 7 days.
A large number of people with HIV-infection obtained HIV through injection drug use. Some of these people are currently being treated with buprenorphine/naloxone (BUP) for their addiction and with medications for HIV infection. Tipranavir is a medication that was recently approved by the Food and Drug Administration (FDA) for the treatment of HIV-infection. Tipranavir is given in combination with another HIV medication, ritonavir. Tipranavir acts by making it more difficult for the virus that causes AIDS to multiply and cause more damage to the immune system. Ritonavir acts by increasing the amount of tipranavir available to fight HIV.
Earlier studies looking at the combination of BUP and HIV medications have shown that BUP and some HIV medications act differently when taken together. It is important to learn if taking BUP and HIV medications together results in changes in the blood level of either medication. If the HIV medication decreases the level of BUP in the blood, an individual taking BUP and HIV medications may experience symptoms of withdrawal ("dope sickness"), even while taking their usual dose of BUP. On the other hand, if BUP decreases the amount of HIV medication in the blood, then the HIV medication may be less effective in controlling HIV infection. It is therefore important to learn if tipranavir/ritonavir and BUP will affect each other when taken together.
In order to learn about the effects of BUP on tipranavir/ritonavir, we will need to measure the amount of BUP in your blood for 24 hours after you have taken tipranavir/ritonavir and BUP together and then compare that to the amount of BUP in your blood when you are not taking tipranavir/ritonavir.
|United States, Connecticut|
|Yale University School of Medicine AIDS Program|
|New Haven, Connecticut, United States, 06510|
|Principal Investigator:||Robert D Bruce, MD||Yale University|