NSAIDs Stent Study

Inclusion Criteria:

* Over 18 years of age and willing and able to provide informed consent
* Patients with renal urolithiasis planning to undergo ureteral stent placement following ureteroscopic manipulation

Exclusion Criteria:

* Patients requiring a bilateral stone procedure.
* Patients on a chronic non-steroidal anti-inflammatory drugs (NSAIDs) including Aspirin defined as any NSAIDs use for more than fifteen days within thirty days prior to the procedure. Exception: use of daily Aspirin 81 mg is allowed.
* Patients on any steroid therapy.
* Patients with prescription anti-inflammatory drugs.
* Patients with gastrointestinal ulcers.
* Patients with ureteral obstruction or stricture unrelated to stone disease.
* Patients with active urinary tract infection as evidence of untreated positive urine culture obtained prior to the procedure (as part of pre-operative testing).
* Patients with preexisting indwelling ureteral stent
* Patients who are pregnant or lactating.
* Patients with renal or liver impairment.
* Patients with concurrent disease, infection, or co-morbidity that, in the judgment of the investigator, would render the patient inappropriate for enrollment.