Indiana Code Title 9. Motor Vehicles § 9-13-2-86

(1) alcohol;

(2) a controlled substance (as defined in IC 35-48-1);

(3) a drug other than alcohol or a controlled substance;

(4) a substance described in IC 35-46-6-2 or IC 35-46-6-3;

(5) a combination of substances described in subdivisions (1) through (4); or

(6) any other substance, not including food and food ingredients (as defined in IC 6-2.5-1-20), tobacco (as defined in IC 6-2.5-1-28), or a dietary supplement (as defined in IC 6-2.5-1-16);