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Clin Infect Dis. 2012 Feb 1;54(3):414-23. doi: 10.1093/cid/cir799. Epub 2011 Nov 18.

Interactions between buprenorphine and the protease inhibitors darunavir-ritonavir and fosamprenavir-ritonavir.

Author information

1
Department of Psychiatry, University of California San Francisco, CA, USA. valerie.gruber@ucsf.edu

Abstract

BACKGROUND:

This study examined drug interactions between buprenorphine, a partial opioid agonist used for opioid dependence treatment and pain management, and the protease inhibitors (PIs) darunavir-ritonavir and fosamprenavir-ritonavir.

METHODS:

The pharmacokinetics of buprenorphine and its metabolites and symptoms of opioid withdrawal or excess were compared in opioid-dependent, buprenorphine-naloxone-maintained, human immunodeficiency virus (HIV)-negative volunteers (11 for darunavir-ritonavir and 10 for fosamprenavir-ritonavir) before and after 15 days of PI administration. PI pharmacokinetics and adverse effects were compared between the buprenorphine-maintained participants and an equal number of sex-, age-, race-, and weight-matched, healthy, non-opioid-dependent volunteers who received darunavir-ritonavir or fosamprenavir-ritonavir but not buprenorphine.

RESULTS:

There were no significant changes in buprenorphine or PI plasma levels and no significant changes in medication adverse effects or opioid withdrawal. Increased concentrations of the inactive metabolite buprenorphine-3-glucuronide suggested that darunavir-ritonavir and fosamprenavir-ritonavir induced glucuronidation of buprenorphine.

CONCLUSIONS:

Dose adjustments are not likely to be necessary when buprenorphine and darunavir-ritonavir or fosamprenavir-ritonavir are coadministered for the treatment of opioid dependence and HIV disease.

PMID:
22100576
PMCID:
PMC3258270
DOI:
10.1093/cid/cir799
[Indexed for MEDLINE]
Free PMC Article

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