Floridians could gain access to cheaper prescription drugs from Canada if the federal government agrees under legislation approved Monday by a Florida State Senate committee.  U.S. spending on prescription drugs tops $1,000 per person annually and is 30 to 190 percent higher than nine other western countries. Under the Senate bill, a vendor would be chosen to administer the Canadian drug import program in Florida. Imported drugs would have to meet U.S. Food and Drug Administration standards for safety, effectiveness, misbranding, and adulteration. Controlled substances, drugs that are injected, and certain biological products would not be permitted.