I have L4 and L5 compressed discs and possibly one in my neck, muscle strain & spasms would it be ok to go on a 5 hr road trip? I was in a car accident in aug/11 and injured my right shoulder, neck and back. I have a stiff shoulder (possible adhesive caps

Take breaks. I would not recommend being the driver on this road trip if possible, especially not if you're taking pain medications that cause sedation or impaired ability to drive. During the trip, take regular breaks to get out of the car, stretch and relax. Take a break every 30-60 min, or whenever you find the discomfort increasing.
There . There is nothing about just riding in a car on good roads that is damaging.