| Vital signs |
| Blood pressure increased or unchanged; decreased if hypovolemic |
| Heart rate increased or unchanged |
| Respiratory rate increased or unchanged |
| Temperature unchanged |
| Gastrointestinal |
| Nausea, vomiting |
| Diarrhea, increased bowel sounds |
| Neurological |
| Mental status usually normal, irritable |
| Restlessness |
| Seizures (neonates only) |
| Tremor |
| Yawning |
| Ophthalmologic |
| Lacrimation |
| Mydriasis |
| Skin |
| Piloerection |
| Diaphoresis |
| Other findings |
| Rhinorrhea |
