Hello, you have history of
sciatica and backpain, and also you are taking medicine for it. I can understand how much it will be difficult for you to deal with this issues specially in the morning.
here, I would like to suggest to some basic but worthful advice which will help you to minimise your problem.
first, when you woke up in the morning, dont try to get up from your bed immediatly. when you woke up, start some basic exercise in bed like fold your legs towards your tummy, repeat 10 times.
next, bend your hip and knees fully and move your legs as a single
unit in both side.
next,
hamstring stretching in bed.
next, calf muscle stretching in bed.
next, now you can get up from your bed with sidelying position and not from the front side.
I think this will help in less difficult in the morning hours. but start doing streching exercise and make it a routine habit. you may feel better.
I hope this will help.