In reference to my piece on doctor-assisted suicide, a doctor e-mails to note that FDA regulations do not require doctors to use approved drugs for specified purposes. “Off-label” use is permitted — and that’s a good thing. While, as a legal matter, this does not preclude the Justice Department’s efforts to use the Controlled Substances Act to prevent doctor-assisted suicide, it illustrates another conflict between conservative principles (in this case, less stringent FDA regulation of drugs), and the federalcampaign against Oregon’s law. To be clear: I am not defending Oregon’s decision to legalize doctor-assisted suicide, but criticizing the Justice Department’s campaign against it.