I' not sure of what you mean by, shaking inside.
Some of Paxil's side effects could be construed to fit what you are saying, this is taken directly from Health Central's Healthsquare.com about Paxil, which you can find here:
Tell your doctor immediately if any of these unlikely but serious side effects occur:
There is more information about Paxil at that link.
Contact your doctor, they may need to adjust the dosage, or another drug.
I have not taken paxil. But here is a site that offers side effects information:
These are the serious side effects listed.
* seizure (convulsions);
*tremors, shivering, muscle stiffness or twitching;
*problems with balance or coordination;
*agitation, confusion, sweating, fast heartbeat; or
*easy bruising or bleeding (such as a nosebleed).
Less serious Paxil side effects may include:
*feeling nervous, restless, or unable to sit still;
*drowsiness, dizziness, weakness;
*sleep problems (insomnia);
*nausea, constipation, loss of appetite;
*decreased sex drive, impotence, or difficulty having an orgasm; or
*dry mouth, yawning, or ringing in your ears
You should inform your doctor of the side effects you are experiencing.