Allopurinol Outcome Study

ClinicalTrials.gov ID: NCT01391325

Public ClinicalTrials.gov record NCT01391325. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.

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ClinicalTrials.gov public records Last synced Oct 26, 2026, 10:35 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Official title

Long-term Allopurinol Safety Study Evaluating Outcomes in Gout Patients (LASSO)

Brief summary

Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.

This is a study of allopurinol in gout patients with hyperuricemia that will evaluate the safety and serum urate (sUA) lowering capability of allopurinol as a urate lowering therapy (ULT) for up to six months. Allopurinol will be dosed according to the local product label, at the discretion of the Investigator, to achieve an optimal, medically appropriate dose for each patient.

Study identification

NCT ID: NCT01391325
Recruitment status: Completed
Study type: Interventional
Phase: Phase 4
Lead sponsor: Ardea Biosciences, Inc.; Industry
Enrollment: 1,735 participants

Conditions and interventions

Conditions

Gout

Interventions

Allopurinol Drug

Drug

Eligibility (public fields only)

Age range: 18 Years to 85 Years
Sex: All
Healthy volunteers: Healthy volunteers not accepted

This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.

Study timeline

Start date: Jul 2011 (Type not available)
Primary completion: Jan 2013 (Actual)
Completion: Mar 2013 (Actual)
Last update posted: Jun 17, 2014

2011 – 2013

United States locations

U.S. sites: 127
U.S. states: 38
U.S. cities: 116

Facility	City	State	ZIP	Site status
Not listed	Birmingham	Alabama	35242	—
Not listed	Birmingham	Alabama	35294	—
Not listed	Bringham	Alabama	35216	—
Not listed	Calera	Alabama	35040	—
Not listed	Huntsville	Alabama	35801	—
Not listed	Mobile	Alabama	36608	—
Not listed	Chandlers	Arizona	85224	—
Not listed	Green Valley	Arizona	85614	—
Not listed	Jonesboro	Arizona	72401	—
Not listed	Phoenix	Arizona	85028	—
Not listed	Phoenix	Arizona	85050	—
Not listed	Tucson	Arizona	85704	—
Not listed	Little Rock	Arkansas	72204	—
Not listed	Little Rock	Arkansas	72205	—
Not listed	Anaheim	California	92805	—
Not listed	Carmichael	California	95608	—
Not listed	Covina	California	91723	—
Not listed	Hemet	California	92543	—
Not listed	Irvine	California	92618	—
Not listed	Los Angeles	California	90048	—
Not listed	Mission Viejo	California	92691	—
Not listed	Pasadena	California	91107	—
Not listed	Sacramento	California	95816	—
Not listed	San Diego	California	92108	—
Not listed	San Ramon	California	94583	—
Not listed	Santa Maria	California	93454	—
Not listed	Weslake Village	California	91361	—
Not listed	Denver	Colorado	80220	—
Not listed	Englewood	Colorado	80113	—
Not listed	Danbury	Connecticut	06810	—
Not listed	Trumbull	Connecticut	06611	—
Not listed	Brandenton	Florida	34208	—
Not listed	Brandon	Florida	33511	—
Not listed	Brooksville	Florida	34601	—
Not listed	East Brandenton	Florida	34208	—
Not listed	Fleming Island	Florida	32003	—
Not listed	Jacksonville	Florida	32205	—
Not listed	Jacksonville	Florida	32216	—
Not listed	Jupiter	Florida	33458	—
Not listed	Miami	Florida	33135	—
Not listed	Oldsmar	Florida	34677	—
Not listed	Orlando	Florida	32804	—
Not listed	Ormond Beach	Florida	32174	—
Not listed	Plant City	Florida	33563	—
Not listed	Port Orange	Florida	32127	—
Not listed	Sanford	Florida	32771	—
Not listed	St. Petersburg	Florida	33709	—
Not listed	Tampa	Florida	33606	—
Not listed	Vero Beach	Florida	32960	—
Not listed	Winter Haven	Florida	33880	—
Not listed	Zephyrhills	Florida	33542	—
Not listed	Atlanta	Georgia	30308	—
Not listed	Newnan	Georgia	30265	—
Not listed	Honolulu	Hawaii	96814	—
Not listed	Meridian	Idaho	83646	—
Not listed	Addison	Illinois	60101	—
Not listed	Chicago	Illinois	60612	—
Not listed	Chicago	Illinois	60637	—
Not listed	Gurnee	Illinois	60031	—
Not listed	Evansville	Indiana	47713	—
Not listed	Elizabethtown	Kentucky	42701	—
Not listed	Lexington	Kentucky	40504	—
Not listed	Louisville	Kentucky	40213	—
Not listed	Monroe	Louisiana	71203	—
Not listed	Cumberland	Maryland	21502	—
Not listed	Frederick	Maryland	21702	—
Not listed	Hagerstown	Maryland	21740	—
Not listed	Wheaton	Maryland	20902	—
Not listed	Hyannis	Massachusetts	02601	—
Not listed	Worcester	Massachusetts	01605	—
Not listed	South Traverse City	Michigan	49684	—
Not listed	Rochester	Minnesota	55905	—
Not listed	Olive Branch	Mississippi	38654	—
Not listed	Florissant	Missouri	63031	—
Not listed	Kansas City	Missouri	64114	—
Not listed	St Louis	Missouri	63117	—
Not listed	St Louis	Missouri	63128	—
Not listed	Omaha	Nebraska	68114	—
Not listed	Las Vegas	Nevada	89119	—
Not listed	Reno	Nevada	89502	—
Not listed	Nashua	New Hampshire	03060	—
Not listed	Albuquerque	New Mexico	87102	—
Not listed	Albuquerque	New Mexico	87106	—
Not listed	Albany	New York	12206	—
Not listed	Endwell	New York	13760	—
Not listed	Hartsdale	New York	10530	—
Not listed	Charlotte	North Carolina	28210	—
Not listed	Harrisburg	North Carolina	28075	—
Not listed	Hickory	North Carolina	28602	—
Not listed	Raleigh	North Carolina	27609	—
Not listed	Raleigh	North Carolina	27612	—
Not listed	Wilmington	North Carolina	28401	—
Not listed	Fargo	North Dakota	58103	—
Not listed	Cincinnati	Ohio	45224	—
Not listed	Cincinnati	Ohio	45242	—
Not listed	Cleveland	Ohio	44122	—
Not listed	Columbus	Ohio	43203	—
Not listed	Dayton	Ohio	45417	—
Not listed	Middleburg Heights	Ohio	44130	—
Not listed	Oklahoma City	Oklahoma	73103	—
Not listed	Eugene	Oregon	97402	—
Not listed	Portland	Oregon	97220	—
Not listed	Altoona	Pennsylvania	16602	—
Not listed	Duncansville	Pennsylvania	16635	—
Not listed	Lancaster	Pennsylvania	17601	—
Not listed	Charleston	South Carolina	29407	—
Not listed	Mt. Pleasant	South Carolina	29464	—
Not listed	Spartanburg	South Carolina	29303	—
Not listed	Jackson	Tennessee	38305	—
Not listed	Spring Hill	Tennessee	37174	—
Not listed	Dallas	Texas	75216	—
Not listed	Dallas	Texas	75235	—
Not listed	Houston	Texas	77074	—
Not listed	Houston	Texas	77088	—
Not listed	Irving	Texas	75061	—
Not listed	Mesquite	Texas	75150	—
Not listed	San Antonio	Texas	78229	—
Not listed	Sugar Land	Texas	77479	—
Not listed	Bountiful	Utah	84010	—
Not listed	West Jordan	Utah	84088	—
Not listed	Arlington	Virginia	22205	—
Not listed	Richmond	Virginia	23294	—
Not listed	Port Orchard	Washington	98366	—
Not listed	Seattle	Washington	98122	—
Not listed	Spokane	Washington	99208	—
Not listed	Tacoma	Washington	98405	—
Not listed	Morgantown	West Virginia	26505	—

Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.

Non-U.S. locations

This page focuses on the U.S. directory. The official record also lists 46 non-U.S. sites.

About this trial record page

What this page shows: Public field values for ClinicalTrials.gov record NCT01391325, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
What this page does not do: No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
Where the data comes from: Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
Last refresh: Last update posted Jun 17, 2014 · Synced Oct 26, 2026

Open the official record

The complete public registry record, listed eligibility criteria, and available contact information for NCT01391325 live on ClinicalTrials.gov.

View official ClinicalTrials.gov record →