My belief is no, at least for sedatives or tranquilizers. Here's why: Sedatives and tranquilizers are controlled substances that are prescribed only in specific circumstances. Most people are not given Xanax, for example, or Valium,to be taken daily, due to the ability of this class of medications to be highly addictive, and side effects if taken regularly.
Jails are not in the business of giving out controlled substances. In institutions like that, it is very hard to get diagnosed with anything and treated. Usually, people on medication were diagnosed on the outside and prescribed meds which the jail doctors affirm. But even if casey was prescribed something like Xanax on the outside, it is unlikely that she would be given it on the inside for long. Instead, she would be prescribed a serotonin reuptake inhibitor, like a Prozac class, which would not cause a tranquilized appearance or demeanor if prescribed correctly.
But I doubt she would even be prescribed something like that.
People with psychiatric issues like depression usually suffer hard in places like jails and prisons. It can takes a long time for them to get diagnosed and treated. Usually, if an inmate panics or freaks out, they are watched and placed in an area where they can't hurt themselves, or placed in restraints, none of which help. In extreme cases, they may give them a one-time sedative via a shot or a pill, after being examined by a PA or doctor.
I highly doubt casey had a prescription for xanax on the outside and I almost guarantee she doesn't have one now.
What we are seeing is a mostly bored and angry young person with at the least, sociopathic tendencies, who is annoyed and amazed and "frushtrated" that she could not talk her way out of this one.
She does not have a tranquilized appearance to me. If she was on tranqs, it is likely that she would start to nod off in the afternoon. Instead, she maintains her usual icy, or flirty, or angry demeanor.