Even if it's approved, federal prosecutors could shut down any dispensaries, as they have in other states. Arkansas Attorney General Dustin McDaniel said the conflict with federal law is one of the reasons he opposes the measure.
Gov. Mike Beebe, another opponent, said aside from the federal legal questions, there are also worries about how much it will cost the state to regulate dispensaries.
"Those are serious questions, and a lot of that is unanswerable because you don't know how many dispensing places are going to apply or going to be granted," Beebe said.
Even some of the state's medical marijuana supporters are somewhat wary of the proposal.
State Sen. Randy Laverty, who said he generally supports medical marijuana, said he's undecided and wants to review the proposal to make sure any dispensary system is tightly controlled.
"I don't know if Arkansas is ready for medicinal marijuana or not," Laverty said. "But if they are, I doubt they would want open dispensaries on the corners in various towns."
Andrew DeMillo can be reached at www.twitter.com/ademillo
Copyright 2012 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.