Would like to add that when I was in the court, knowing I was about to be sentenced to a lengthy prison sentence, I took 1,000ml of methadone (It should be noted that i had a healthy opiate tolerance though) along with 80,000mg of Quietapine XR caps. During the journey to the prison, I was repeatedly becoming unconscious and falling to the floor, despite being in a prisoner transportation vehicle. These contain mini cells for prisoners that are little bigger than the seat (about 3ftx3ftx8ft), with no ventilation so it's not a great place to spend much time, especially if you are at all claustrophobic. One officer drives while another is assigned to monitoring the prisoners. The journey took several hours, making a number of stops along the way as some facilities are for specific sexes only and there are different categories of prisoner that a facility caters for.
Obviously, I survived. Upon arrival all prisoners are assessed by a doctor. I was described as "Overly sedated" and held in the healthcare wing in a cell which is constantly monitored by cameras and staff. Apart from a heavy sleep in a very hard bed, really nothing to report. Some months later, a staff member in the medical department commented to me about the state I had been in upon arrival, so it must have made quite an impression.
So yeah...no. Wouldn't recommend.