Definition of the drug administration errors assessed in this survey
| Category of medication administration error | Definition |
| Tablet dissolution | Not the entire dissolution/suspension was administered, or undissolved tablet fragments were left |
| Tablet storage | Tablets stored outside the blister after splitting |
| Oral liquids | Inappropriate administration of oral liquids—for example, remaining liquids once out of the bottle were poured back into the storage bottle after administration of the intended amount to the patient |
| Tablet splitting | Inappropriate splitting of tablets according to drug label or splitting of different tablets for different patients without cleaning the tablet splitter |
| Gastric tube | Combined preparation and administration of drugs via gastric tube that must be administered separately or, when milling tablets, active ingredient was left in the mortar after use |
| Others | Other errors not predefined, such as the number of administered tablets not kept at a minimum—for example, two tablets, instead of one (double strength) tablet, were administered |