Endorphins are one of the seven important neurotransmitters. Endorphins control pleasurable sensations and control of pain.

Endorphins were first discovered in 1975.

  • A neurotransmitter that can make you feel good.
  • Endorphins are released by exercise; they produce a general state of well being.
  • The body's own opiate-like substances


  • If your body is being put through pain then it will release endorphins to try and block/stop the pain.
  • Opiates such as heroin and opium artificially increase endorphin levels

Additional Resources

  1. Endorphins
  2. After injecting 90 rats with different forms of endorphins, over a long period of time, serious issues began to occur. Prolonged use of endorphins such as alpha-, beta-, and gamma, when mixed with opiate antagonists can lead to muscular ridgidness, and immobility. Also, some of the rats were showing signs of "wet dog" shakes. In some cases, the beta-endorphins produce hypothermia, whereas the gamma-endorphins produce hyperthermia. This means that an excessive release of endorphins, mixed with certain opiate antagonists suchs as nalxone, can lead to serious mental illness. A good connection to this experiment could be a heroin, or other opiate abuser having an unordinary amount of endorphins in the blood stream. Given the correct type of endorphins, mental illness can occur.
  3. Bloom, F., Segal, D., Ling, N., & Guillemin, R. (1976). Endorphins: profound behavioral effects in rats suggest new etiological factors in mental illness. Science; Science.