The Texas Medical Board is proposing tighter regulations around ketamine, a popular fast-acting sedative used to treat mental illness, including more physician oversight during administration of the drug and banning in-home use of it. The revised rules are expected to publish May 8, and the Texas Medical Board is scheduled to vote on the changes in June. Supporters of ketamine regulations in Texas say the drug, which can cause comas and even death, has grown in popularity because it is easy to