addiction america analgesics benzodiazepineabuse benzodiazepines body brain buprenorphine chemistry chronicpain community congresses control diseases drug-abuse drug-epidemic drug-rehabilitation drugabuse drugaddicts drugcontrol drugoverdose drugtolerance drugusers endorphins ethics governmentpolicy heroin heroinabuse hope human-connection journalism largetypebooks law-enforcement medical medicalcare medicalethics medicationabuse metabolism methadonemaintenance methamphetamine mind mitragyna moralandethicalaspects moralphilosophy naloxone naltrexone narcotics newyorktimesbestseller nonfiction nyt:paperback-nonfiction=2019-09-08 opiatesubstitutiontreatment opiodabuse opioid opioid-relateddisorders opioidabuse overdose oxycodone oxycodoneabuse personal-stories pharmaceuticalindustry pharmacology philosophy physiologicaleffect physiology plantpreparations prevention public-health qv89 recovery recovery-stories rehabilitation resilience safetymeasures social-issues substance-relateddisorders suicidalbehavior suicide therapeuticuse therapy treatment united-states veterans veteranshealth