Study of Silodosin to Facilitate Passage of Urinary Stones

This study has been completed.
Information provided by (Responsible Party):
Watson Pharmaceuticals Identifier:
First received: June 14, 2010
Last updated: August 7, 2013
Last verified: August 2013

The purpose of this study is to assess if patients treated with sildosin will have a higher spontaneous passage rate of their ureteral stone than those treated with placebo.

Condition Intervention Phase
Ureteral Calculi
Kidney Stones
Drug: silodosin
Drug: placebo
Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Double-Blind, Placebo-Controlled Study of Silodosin to Facilitate Urinary Stone Passage

Resource links provided by NLM:

Further study details as provided by Watson Pharmaceuticals:

Primary Outcome Measures:
  • Spontaneous stone passage without need for emergency department visits, hospital admissions, surgical intervention, or other interventional procedures. [ Time Frame: 4 weeks ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • Time to spontaneous stone passage. [ Time Frame: 4 weeks ] [ Designated as safety issue: No ]
  • Need for outpatient narcotic analgesic use for pain relief. [ Time Frame: 4 weeks ] [ Designated as safety issue: No ]
  • Pain scale ratings. [ Time Frame: 4 weeks ] [ Designated as safety issue: No ]

Estimated Enrollment: 240
Study Start Date: June 2010
Study Completion Date: July 2012
Primary Completion Date: July 2012 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: silodsosin Drug: silodosin
one silodosin 8 mg capsule orally, once daily, with food for up to 4 weeks
Placebo Comparator: placebo Drug: placebo
one placebo capsule orally, once daily, with food for up to 4 weeks


Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • At least 18 years of age or older
  • Male or a non-pregnant, non-lactating female using adequate means of birth control, if not menopausal
  • Have radiopaque unilateral ureteral calculus ≥4mm and ≤10mm in any location of the ureter

Exclusion Criteria:

  • Multiple ureteral calculi, or a solitary kidney, or refractory renal colic, or a non-opaque calculus, or active urinary tract infection, or severe hydronephrosis
  • History of previous ureteral surgery or ureteral stricture on affected side
  • History of any of the following conditions: myasthenia gravis, myopathy, spina bifida, spinal cord injury, autonomic nervous system disorder, fibromyalgia, breast cancer
  • Moderate to severe renal impairment or severe liver insufficiency
  • History of significant postural hypotension
  • Is receiving medication(s) which preclude safe participation in the study or that may produce a confounding effect on the variables under study
  • History of allergy to alpha-blockers or oxycodone
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01144949

  Show 27 Study Locations
Sponsors and Collaborators
Watson Pharmaceuticals
Study Director: Scott Olsen, MPH Watson Pharmaceuticals, Inc.
  More Information

No publications provided

Responsible Party: Watson Pharmaceuticals Identifier: NCT01144949     History of Changes
Other Study ID Numbers: SIL1001
Study First Received: June 14, 2010
Last Updated: August 7, 2013
Health Authority: United States: Food and Drug Administration

Keywords provided by Watson Pharmaceuticals:
ureteral calculi
renal colic
ureteral stones
kidney stones
medical expulsive therapy

Additional relevant MeSH terms:
Kidney Calculi
Ureteral Calculi
Urinary Calculi
Pathological Conditions, Anatomical
Kidney Diseases
Urologic Diseases
Ureteral Diseases
Adrenergic alpha-1 Receptor Antagonists
Adrenergic alpha-Antagonists
Adrenergic Antagonists
Adrenergic Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Pharmacologic Actions
Physiological Effects of Drugs
Urological Agents
Therapeutic Uses processed this record on July 31, 2014