Don't self med. Versed is a strong, short acting sedative. It must be administered by a properly trained health professional in a controlled setting. That means proper monitoring of blood pressure, oxygen saturation, heart and respiratory rates, among other things. There must be equipment on hand to support breathing and manage medical emergencies. It is not intended to be self-administered.
Midazolam . Pretty standard for IV sedation performed by omfs. They monitor your bp, oxygen. And respiration during surgery.