and muscle pain
most commonly occurs from bad positioning in a chair or during sleep. This is a temporary condition but can occur again if you do not take measures to modify the cause which led to this condition: for example, you might need to change your chair or pillows.
The medicines you have been prescribed work very well to decrease stiffness. Along with those, you can resort to warm compresses over the back. This condition might take a few days to completely subside so do not get anxious, there is no serious issue to your health!