A new federally funded study into the effects of cannabis terpenes suggests that the compounds could be “potential therapeutics for chronic neuropathic pain,” finding that an injected dose of the compounds produced a “roughly equal” reduction in pain markers when compared to a smaller dose of morphine. Terpenes also appeared to enhance the efficacy of morphine when given in combination.

Unlike with morphine, however, none of the studied terpenes produced a meaningful reward response, the research found, indicating that “terpenes could be effective analgesics with no rewarding or dysphoric side effects.”

Notably, terpenes that were vaporized or administered orally seemed to have little impact on pain.