title: Interaction between buprenorphine and atazanavir or atazanavir/ritonavir.
abstract: Opioid addiction and HIV disease frequently co-occur. Adverse drug interactions have been reported between methadone and some HIV medications, but less is known about interactions between buprenorphine, an opioid partial agonist used to treat opioid dependence, and HIV therapeutics. This study examined drug interactions between buprenorphine and the protease inhibitors atazanavir and atazanavir/ritonavir. Opioid-dependent, buprenorphine/naloxone-maintained, HIV-negative volunteers (n=10 per protease inhibitor) participated in two 24-h sessions to determine pharmacokinetics of (1) buprenorphine and (2) buprenorphine and atazanavir (400mg daily) or atazanavir/ritonavir (300/100mg daily) following administration for 5 days. Objective opiate withdrawal scale scores and mini-mental state examination were determined prior to and following antiretroviral administration to examine pharmacodynamic effects. Pharmacokinetics of atazanavir and atazanavir/ritonavir were compared in subjects and matched, healthy controls (n=10 per protease inhibitor) to determine effects of buprenorphine. With atazanavir and atazanavir/ritonavir, respectively concentrations of buprenorphine (p<0.001, p<0.001), norbuprenorphine (p=0.026, p=0.006), buprenorphine glucuronide (p=0.002, p<0.001), and norbuprenorphine glucuronide (NS, p=0.037) increased. Buprenorphine treatment did not significantly alter atazanavir or ritonavir concentrations. Three buprenorphine/naloxone-maintained participants reported increased sedation with atazanavir/ritonavir. Atazanavir or atazanavir/ritonavir may increase buprenorphine and buprenorphine metabolite concentrations and might require a decreased buprenorphine dose.
authors.affiliation: Virginia Commonwealth University, Richmond, VA, USA. emccancekatz@vcu.edu
authors.forename: Elinore F
authors.initials: EF
authors.lastname: McCance-Katz
authors.forename: David E
authors.initials: DE
authors.lastname: Moody
authors.forename: Gene D
authors.initials: GD
authors.lastname: Morse
authors.forename: Qing
authors.initials: Q
authors.lastname: Ma
authors.forename: Robin
authors.initials: R
authors.lastname: DiFrancesco
authors.forename: Gerald
authors.initials: G
authors.lastname: Friedland
authors.forename: Patricia
authors.initials: P
authors.lastname: Pade
authors.forename: Petrie M
authors.initials: PM
authors.lastname: Rainey
mesh_terms: D000328:Adult; D000701:Analgesics, Opioid / Q000494:pharmacology / Q000627:therapeutic use*; D000069446:Atazanavir Sulfate; D002047:Buprenorphine / Q000493:pharmacokinetics / Q000627:therapeutic use*; D004347:Drug Interactions; D005260:Female; D015658:HIV Infections / Q000150:complications / Q000188:drug therapy; D017320:HIV Protease Inhibitors / Q000493:pharmacokinetics / Q000627:therapeutic use*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009842:Oligopeptides / Q000493:pharmacokinetics / Q000627:therapeutic use*; D011725:Pyridines / Q000493:pharmacokinetics / Q000627:therapeutic use*; D019438:Ritonavir / Q000493:pharmacokinetics / Q000627:therapeutic use*; D019966:Substance-Related Disorders / Q000150:complications / Q000188:drug therapy
chemical_list: D000701:Analgesics, Opioid; D017320:HIV Protease Inhibitors; D009842:Oligopeptides; D011725:Pyridines; D002047:Buprenorphine; D000069446:Atazanavir Sulfate; D019438:Ritonavir