Unlike opioid drugs like morphine and fentanyl that travel throughout the body, the opioids your body produces are released in small quantities to specific locations.
Prescription monitoring offers a way to prevent accidental overdoses and identify patients with dangerous addictions. But looking after these patients is going to be a challenge.
The herb kratom has a large following and is so popular that it is sold in vending machines. The FDA recently issued a public warning about the herb, which contains low levels of opioids.