(Time) The drugs used to execute prisoners in the United States sometimes fail to work as planned, causing slow and painful deaths that probably violate constitutional bans on cruel and unusual punishment, a new medical review of dozens of executions concludes.

Even when administered properly, the three-drug lethal injection method appears to have caused some inmates to suffocate while they were conscious and unable to move, instead of having their hearts stopped while they were sedated, scientists said in a report published Monday by the online journal PLoS Medicine.

I have an idea. Let’s just take the Terri Schiavo route and dehydrate them for a couple of weeks. That was deemed humane, wasn’t it?