225 ILCS 85/22
Except only in the case of a drug, medicine or poison which is lawfully sold or dispensed, at retail, in the original and unbroken package of the manufacturer, packer, or distributor thereof, and which package bears the original label thereon showing the name and address of the manufacturer, packer, or distributor thereof, and the name of the drug, medicine, or poison therein contained, and the directions for its use, no person shall sell or dispense, at retail, any drug, medicine, or poison, without affixing to the box, bottle, vessel, or package containing the same, a label bearing the name of the article distinctly shown, and the directions for its use, with the name and address of the pharmacy wherein the same is sold or dispensed. However, in the case of a drug, medicine, or poison which is sold or dispensed pursuant to a prescription of a physician licensed to practice medicine in all of its branches, a physician assistant in accordance with subsection (f) of Section 4 of this Act, an advanced practice registered nurse in accordance with subsection (g) of Section 4 of this Act, a licensed dentist, a licensed veterinarian, a licensed podiatric physician, or a licensed optometrist , the label affixed to the box, bottle, vessel, or package containing the same shall show: (a) the name and address of the pharmacy wherein the same is sold or dispensed; (b) the name or initials of the person, authorized to practice pharmacy under the provisions of this Act, selling or dispensing the same, (c) the date on which such prescription was filled; (d) the name of the patient; (e) the serial number of such prescription as filed in the prescription files; (f) the last name of the practitioner who prescribed such prescriptions; (g) the directions for use thereof as contained in such prescription; and (h) the proprietary name or names or the established name or names of the drugs, the dosage and quantity, except as otherwise authorized by rule of the Department.
225 ILCS 85/22