Oxycontin used to contain talc, and this came with prominent health warnings. Shooting up dissolved oxycontin pills containing talc is dangerous. See http://www.accessdata.fda.gov/drugsatfda_docs/label/2008/020... ("with parenteral abuse, the [inactive ingredients], especially talc, can be expected to result in [many bad things]").

As of some time in 2014, oxycontin no longer contains talc -- it has been replaced by magnesium stearate. However, that health warning that parenteral abuse causes many bad things has not been altered except to remove the phrase "especially talc". Pulmonary granulomas are still specifically called out as something bad that will happen to you if you inject oxycontin. See the current usage information at http://app.purduepharma.com/xmlpublishing/pi.aspx?id=o .

SPECULATIVELY: this means that while talc is no longer present, oxycontin might still contain legally-mandated adulteration. I found no evidence for a legal mandate, but this was not a comprehensive investigation.

It has long been the explicit policy of the United States that people who abuse otherwise legal chemicals deserve to be poisoned to death, and we have had and do have laws to this effect. See http://www.slate.com/articles/health_and_science/medical_exa... .

It's that last point that makes me hesitate to slam your parent comment for fearmongering.