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. Author manuscript; available in PMC: 2014 Aug 1.
Published in final edited form as: Drug Alcohol Depend. 2012 Dec 14;131(3):258–262. doi: 10.1016/j.drugalcdep.2012.11.014

Figure 3.

Figure 3

Mean ± SE norbuprenorphine/buprenorphine ratio of plasma concentrations after IV administration of 2 (■), 4 (▲), 8 (▼), 12 (◆) and 16 (●) mg buprenorphine to five non-dependent IV heroin users.