Notes

https://www.youtube.com/watch?v=YAHVESjVkWs start 1:15 end 7:05 ; 5 min 50sec
http://www.drugfreeworld.org/drugfacts/painkillers.html: prescription drugs are the most commonly used drugs next to marijuana, and almost half of the teens abusing prescription drugs are taking painkillers, Long-term use of painkillers can lead to dependence, even for people who are prescribed them to relieve a medical condition but eventually fall into the trap of abuse and addiction. painkillers are powerful drugs that interfere with the nervous system’s transmission of the nerve signals we perceive as pain. Most painkillers also stimulate portions of the brain associated with pleasure. Thus, in addition to blocking pain, they produce a “high.” Long-term use of painkillers can lead to physical dependence. The body adapts to the presence of the substance and if one stops taking the drug abruptly, withdrawal symptoms occur. Or the body could build up a tolerance to the drug, meaning that higher doses have to be taken to achieve the same effects.