CBD has shown to have the following effects: non psychoactive (does not cause a high), alerting in low to moderate doses, sedating in high doses, reduces pain, reduces muscle spasms, anti-inflammatory, stops nausea/vomiting, reduces anxiety/depression, counters psychotic thoughts, antioxidant, anticonvulsant, neuroprotectant, and anti-tumor.
Source: Cannabis Revealed, Bonni Goldstein M.D.