Supporters of medical marijuana said they were blindsided Monday by the introduction of a Senate bill that places more stringent regulations on the drug’s use and availability than a House version that passed with bipartisan votes just last week. Katie Harrison, a resident of Gillsville, has been fighting alongside members of the Georgia’s Hope organization to legalize cannabis oil, which has the anti-anxiety effects of marijuana without enough of the ingredient that gets an individual high, or intoxicated. Her 2-year-old son, Hawk, suffers from several seizure disorders after a brain hemorrhage suffered when he was 3 weeks old.