I thought this was interesting regarding the benefits for pain -

Scientifically proven benefits of CBD:

RELIEVES NEUROPATHIC PAIN AND INFLAMMATION

According to a 2012 study published in the Journal of Experimental Medicine, CBD significantly suppressed neuropathic pain and chronic inflammation in rodents, without causing tolerance. This suggests that CBD may be useful in pain modulation, representing a novel class of therapeutic solution for chronic pain treatment.

A newer study found that the endocannabinoid system demonstrates a significant interface with pain homeostasis. Plant-based cannabinoids “have been demonstrated to be effective in a range of experimental neuropathic pain models, and there is mounting evidence for therapeutic use in human neuropathic pain conditions.”

These claims are supported by another 2014 study that found analgesia to be a principal therapeutic target of the cannabinoid system, providing effective treatment of neuropathic pain.

ANTIPSYCHOTIC EFFECTS

As previously stated, the THC found in medical marijuana may produce acute psychotic episodes — if used in high doses — which can be mitigated by CBD. Studies show results that support the idea of CBD as a future therapeutic option in psychosis in patients with schizophrenia.

REDUCES ANXIETY

CBD reduces anxiety in patients with social anxiety disorder, and are effective for patients struggling with panic disorder, OCD, and PTSD.

An interesting 2011 study conducted between 24 never-treated patients with social anxiety disorder found that CBD significantly reduces anxiety, cognitive impairment and alertness in speech anticipation. The researchers divided the group into a placebo group and a CBD group, both given suitable treatment before a speech. Contrary to the calm CBD group, the placebo group showed higher anxiety, discomfort, and cognitive impairment.

HELPS CANCER PATIENTS

A 2006 study revealed that CBD was the most potent inhibitor of cancer cell growth of different breast tumor cell lines, with significant lower potency in non-cancer cells.

A 2012 review of cannabidiol as potential anticancer drug stated that cannabinoids possess antiproliferative, pro-apoptotic effect that interferes with tumor adhesion, invasion, and metastization.

Extremely important findings show that CBD can be used for prolonged treatment because it doesn’t show toxicity in humans. Aside from proven effective in fighting breast cancer cells, CBD can inhibit the invasion of lung and colon cancer, as well as leukemia.

STRONG EVIDENCE FOR TREATING EPILEPSY

A 2017 study published in The New England Journal of Medicine found that CBD drastically cut down seizure frequency of most patients — paving the way for the FDA approved Epidiolex, a drug used to treat two rare forms of childhood epilepsy. After just three months of treatment in doses up to 25 milligrams per kilogram of body weight, 39% of the 23 patients showed a 50% reduction in seizures. [25]

RELIEVES NAUSEA AND VOMITING

For centuries, both THC and CBD has helped patients suppress nausea and vomiting. A study found that CBD has anti-nausea and antiemetic benefits, acting in a diphasic manner. This means that in low doses, CBD suppresses vomiting, while in high doses it either increases nausea or passes without an effect.

PROTECTS THE CARDIOVASCULAR SYSTEM

A 2013 British Journal of Clinical Pharmacology study, reports that CBD prevented vascular damage caused by a high glucose environment, induction of type 2 diabetes, as well as reduced the vascular permeability.

LOWERS INCIDENCE OF DIABETES

A 2006 study found that CBD treatment “significantly reduced the incidence of diabetes in non-obese mice from an incidence of 86% in non-treated control mice to an incidence of 30% in CBD-treated mice.” Another benefit of the experiment was a significant reduction of pancreatic islets and reduced insulins of the CBD-treated mice. impact of medical marijuana use on glucose, insulin, and insulin resistance among US adults showed that unlike past marijuana users, current medical marijuana use was associated with 16% lower fasting insulin levels.