Chronic use of steroids can deplete the body of some nutrients and electrolytes:

Calcium
Potassium
Zinc
Magnesium
selenium
folic acid
Vit C
Vit D

Potassium and magnesium are serious, and if you have been using high dose steroids for a while, I'd get them checked.
Some food choices can raise potassium easily... V8 juice, cantaloupe, oranges, bananas, etc. OTC supplements are not an option, they are too low. Also Gatorade is very low--don't be fooled into thinking it is high is potassium. It has 30mg/serving.

Magnesium from nuts and beans or from a supplement.

This might help the "shaking" which may be a sign of low electrolytes.

Potassium tests are available, but magnesium ones often don't show intracellular levels.
I have a magnesium thread:
http://neurotalk.psychcentral.com/thread1138.html
Many people (up to 70%) have less than the RDA for magnesium daily. So add to that a drug that makes you lose it, then you need to consider it.

I'd recommend Vit D testing too. Many people with chronic illnesses are showing up very low in Vit D.