Texas and Tennessee both use pentobarbital for lethal injection. After Christa Pike survived a failed Tennessee execution, experts explain how the states' protocols compare ahead of Texas' next scheduled execution.

Christa Pike, who was convicted in a brutal 1995 killing, continued breathing after she was given two doses of lethal injection drugs, her lawyers said.

From insulin inhalers to epinephrine nasal sprays, new delivery systems are making some lifesaving drugs easier to take.

Could an Injection Reshape Your Body Composition? What the Evidence Reveals