735 ILCS 5/2-1104: Party need not submit to lie detector.

In the course of any civil trial or pre-trial proceeding the court shall not require that the plaintiff or defendant submit to a polygraphic detection deception test, commonly known as a lie detector test or require, suggest or request that the plaintiff or defendant submit to questioning under the effect of thiopental sodium or to any other test or questioning by means of any chemical substance.