In the late 1980's, the United States experienced an epidemic of heroin abusers dying from accidental overdose of a short-acting synthetic opiod agonist, 3-methyl fentanyl, known on the street as China White. This compound was estimated to have 6000 times the potency of morphine. Pharmaceutical fentanyl has 100 times the potency of morphine. Which of the following curves are consistent with this information?
Potency is how must drug concentration is necessary to cause a response in the body. Meaning, the more potent, the less needed to cause a response.