There’s now more scientific evidence for what many patients have known for awhile: Smoking marijuana can ease chronic neuropathic pain and help patients sleep better, according to a team of researchers in Montreal.

The new study, published Monday in the Canadian Medical Association Journal, found that pain intensity among patients decreased with higher-potency marijuana, reports Caroline Alphonso of The Globe and Mail. The study represents an important scientific attempt to determine the medicinal benefits of cannabis.

“A single inhalation of 25 mg of 9.4 percent tetrahydrocannabinol herbal cannabis three times daily for five days reduced the intensity of pain, improved sleep and was well tolerated,” the study concludes. “Further long-term safety and efficacy studies are indicated.”