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. 2021 Dec 20;7(12):e29187. doi: 10.2196/29187

Table 3.

Characteristics of street sales entered in the StreetRx website.

Variables Tapentadol Oxycodone
Number of reports, n (%)

All reports 31 (100) 756 (100)


Extended-release 11 (35.48) 218 (28.84)


Immediate-release 5 (16.13) 437 (57.8)


Unknown 15 (48.39) 101 (13.36)
Geometric mean price per milligram, Aus $ (US$)

All reports 0.12 (0.09) 1.28 (0.91)


Extended-release 0.09 (0.06) 0.69 (0.49)


Immediate-release 0.10 (0.07) 1.84 (1.31)


Unknown 0.16 (0.11) 1.08 (0.77)
Reason for purchase, n (%)

To prevent or treat withdrawal 0 (0) 10 (1.32)

For enjoyment or to get high 0 (0) 45 (5.95)

To resell 1 (3.23) 8 (1.06)

To self-treat pain or another medical condition 14 (45.16) 219 (28.97)

To come down 0 (0) 3 (0.4)

Missing or did not reporta 16 (51.61) 471 (62.3)

aWebsite users might skip this question, indicate they do not wish to answer, do not know the answer, or the question was not asked; the question was added in September 2016.