Despite the potential for new, better opioids, other researchers are focused on an altogether different set of pain - killing drugs: the cannabinoids (made
famous by marijuana, the dried leaves and other parts of the hemp plant, Cannabis sativa).
One of the more
famous studies that has been cited
by the National Institute of Health, among other research papers, is Melanie Dreher's «Prenatal
Marijuana Exposure and Neonatal Outcomes in Jamaica,» published
by the University of Massachusetts and the American Academy of Pediatrics, which also found no significant difference in birth weight, and actually found substantial benefits to children who were born.