Sativex is a new spray could possibly relieve pain for MS (multiple sclerosis) sufferers and people with similar ailments.  "Sativex" has been given preliminary approval by Health Canada.  Sativex is an oral spray made from cannabis aka marijuana.  It seems to be able to check pain, ease muscle tensions and spasms in patients with Multiple Sclerosis.  The drug does not appear to produce a high effect.