Your goal is to extract structured information from the user's input that matches the form described below. When extracting information please make sure it matches the type information exactly. Do not add any attributes that do not appear in the schema shown below.

```TypeScript

 { // Information on the clinical trial characteristics from the abstract
 conditions: string // The condition or disease being treated in the clinical trial
 drug_or_intervention: string // The drug or intervention used in the clinical trial
}
```


Please output the extracted information in JSON format. Do not output anything except for the extracted information. Do not add any clarifying information. Do not add any fields that are not in the schema. If the text contains attributes that do not appear in the schema, please ignore them. All output must be in JSON format and follow the schema specified above. Wrap the JSON in <json> tags.



Input:Pain management after cesarean: a randomized controlled trial of oxycodone versus intravenous piritramide.  Primary objective was to assess whether oral analgesia with oxycodone offers superior pain relief after cesareans than patient controlled analgesia (PCA). Secondary outcomes were additional pain medication, time to first mobilization, therapeutic side effects, postoperative restrictions, overall satisfaction and costs. Randomized controlled trial at a University Hospital conduct between July 2009 and November 2009. Of the 1,112 patients, 257 met the inclusion criteria and 239 agreed to participate. Patients were randomly assigned to either receive intravenous piritramide PCA (2 mg piritramide/ml 0.9 % saline) or oral oxycodone (20 mg). Pain was assessed on a visual analog pain scale (VAS) at 2, 12, 24, 32, 40, 48 and 72 h after cesarean. No differences in VAS scores were observed within the general study population. Pain scores of oxycodone versus PCA were comparable at 24 h. Patients randomized to PCA demonstrated increased demand for rescue medication 48 h after cesarean (p = 0.057). In the PCA group, patients with previous cesarean had increased operative times, a trend towards increased VAS scores after 48 h (p = 0.081) and increased VAS scores in comparison to patients who did not have cesarean before (p = 0.044). For this subgroup, no difference was seen in the oxycodone patients (p = 0.883). General satisfaction with both treatment regimes was high. The results support the potential use of oral pain regimes and emphasis the importance of a multimodal approach to treat post-cesarean pain. Oral oxycodone is a not expensive, convenient and comparable analgesic to PCA devices with opioids after cesarean. Trial registration at clinicaltrials.gov identifier: NCT 01115101. Output:
{'conditions': 'Pain', 'interventions': 'Drug: Oral Oxycodon|Drug: Piritramid|Device: intravenous PCA device'}