“The use of Cannabis for medicinal purposes dates back to ancient times.” http://www.cancer.gov/cancertopics/pdq/cam/cannabis/patient/page1
“Cannabis has been used for medicinal purposes for thousands of years.” http://www.cancer.gov/cancertopics/pdq/cam/cannabis/healthprofessional/page1
“The use of Cannabis for medicinal purposes dates back at least 3,000 years. It came into use in Western medicine in the 19th century and was said to relieve pain, inflammation, spasms, and convulsions.” http://www.cancer.gov/cancertopics/pdq/cam/cannabis/patient/page2
“Cannabis has been shown to kill cancer cells in the laboratory” http://www.cancer.gov/cancertopics/pdq/cam/cannabis/patient/page1
“…cannabinoids may be able to kill cancer cells while protecting normal cells…
A laboratory study of delta-9-THC… showed that it damaged or killed the cancer cells…
A laboratory study of cannabidiol… showed that it caused cancer cell death…” http://www.cancer.gov/cancertopics/pdq/cam/cannabis/patient/page2
“Cannabinoids appear to kill tumor cells but do not effect their nontransformed counterparts and may even protect them from cell death.” http://www.cancer.gov/cancertopics/pdq/cam/cannabis/healthprofessional/page4
“Because cannabinoid receptors, unlike opioid receptors, are not located in the brainstem areas controlling respiration, lethal overdoses from Cannabis and cannabinoids do not occur.” http://www.cancer.gov/cancertopics/pdq/cam/cannabis/healthprofessional/page6