225 ILCS 60/61
The practice of medicine in all of its branches or the treatment of human ailments without the use of drugs and without operative surgery by any person not at that time holding a valid and current license under this Act to do so is hereby declared to be inimical to the public welfare and to constitute a public nuisance. The Secretary of the Department, the Attorney General of the State of Illinois, the State's Attorney of any County in the State, or any resident citizen may maintain an action in the name of the people of the State of Illinois, may apply for an injunction in the circuit court to enjoin any such person from engaging in such practice; and, upon the filing of a verified petition in such court, the court or any judge thereof, if satisfied by affidavit, or otherwise, that such person has been engaged in such practice without a valid and current license to do so, may issue a temporary restraining order or preliminary injunction without notice or bond, enjoining the defendant from any such further practice. A copy of the verified complaint shall be served upon the defendant and the proceedings shall thereafter be conducted as in other civil cases. If it be established that the defendant has been, or is engaged in any such unlawful practice, the court, or any judge thereof, may enter an order or judgment perpetually enjoining the defendant from further engaging in such practice. In all proceedings hereunder the court, in its discretion, may apportion the costs among the parties interested in the suit, including cost of filing complaint, service of process, witness fees and expenses, court reporter charges and reasonable attorneys fees. In case of violation of any injunction entered under the provisions of this Section, the court, or any judge thereof, may summarily try and punish the offender for contempt of court. Such injunction proceedings shall be in addition to, and not in lieu of, all penalties and other remedies in this Act provided.
225 ILCS 60/61