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N-Acetylcysteine as an Adjunct for Refractory Chronic Suppurative Otitis Media

The recruitment status of this study is unknown because the information has not been verified recently.
Verified August 2009 by St. Paul's Hospital, Canada.
Recruitment status was  Not yet recruiting
Information provided by:
St. Paul's Hospital, Canada Identifier:
First received: August 7, 2009
Last updated: August 10, 2009
Last verified: August 2009

Chronic suppurative otitis media (CSOM) can be particularly difficult to treat as a number of patients do not respond to routine antibiotic or surgical treatments. The current treatment involves administering combination antibiotic anti-inflammatory ear drops such as Ciprodex (ciprofloxacin 0.3% / dexamethasone 0.1%). Although most patients experience a relief of symptoms, a fraction of patients remain refractory to treatment. Recent findings suggest that the addition of N-acetylcysteine (0.5-2%) to Ciprodex is a superior treatment for otitis media with effusion compared to the use of Ciprodex alone.

Condition Intervention Phase
Otitis Media
Drug: Ciprodex
Drug: Ciprodex and 2% NAC
Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: N-Acetylcysteine as an Adjunct for Refractory Chronic Suppurative Otitis Media

Resource links provided by NLM:

Further study details as provided by St. Paul's Hospital, Canada:

Primary Outcome Measures:
  • cessation of otorrhea [ Time Frame: 4 weeks ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • durable cessation of otorrhea [ Time Frame: 18 months ] [ Designated as safety issue: No ]

Estimated Enrollment: 30
Study Start Date: October 2009
Estimated Study Completion Date: October 2011
Estimated Primary Completion Date: April 2011 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Ciprodex otic solution
ciprofloxacin 0.3% / dexamethasone 0.1% otic solution
Drug: Ciprodex
Administer 3 to 5 drops tid for 14 days. Continue treatment for another 14 days if otorrhea persists.
Other Name: ciprofloxacin 0.3% / dexamethasone 0.1%
Experimental: Ciprodex with 2% NAC
Ciprodex otic solution (ciprofloxacin 0.3% / dexamethasone 0.1%) augmented with 2% N-acetylcysteine
Drug: Ciprodex and 2% NAC
Administer 3 to 5 drops tid for 14 days. Continue treatment for another 14 days if otorrhea persists.
Other Name: Ciprodex with 2% N-Acetylcysteine

  Show Detailed Description


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

Inclusion Criteria:

  • continuous otorrhea for a duration of greater than 6 months
  • at least 2 previous treatment regimes for otitis media, which may include topical or oral antibiotics, myringotomy or tympanostomy, and surgery

Exclusion Criteria:

  • existing cholesteatoma
  • known allergy to ciprofloxacin, dexamethasone, or N-acetylcysteine
  • patients who are unlikely to adhere to the treatment regime and follow-up visits
  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: NCT00956748

Contact: John Phillips, MD 604-806-8540
Contact: Helen Jiang, B.Sc 604-782-3900

Canada, British Columbia
St. Paul's Hospital Rotary Hearing Clinic Not yet recruiting
Vancouver, British Columbia, Canada, V6Z 1Y6
Principal Investigator: Brian D Westerberg, MD         
Sponsors and Collaborators
St. Paul's Hospital, Canada
Principal Investigator: Brian D Westerberg, MD St. Paul's Hospital Rotary Hearing Clinic
  More Information

Responsible Party: Dr. Westerberg, Brian D., St. Paul's Hospital Rotary Hearing Clinic Identifier: NCT00956748     History of Changes
Other Study ID Numbers: H09-00953
Study First Received: August 7, 2009
Last Updated: August 10, 2009
Health Authority: Canada: Health Canada

Keywords provided by St. Paul's Hospital, Canada:
chronic suppurative otitis media with persistent otorrhea

Additional relevant MeSH terms:
Otitis Media
Otitis Media, Suppurative
Ear Diseases
Otorhinolaryngologic Diseases
Pathologic Processes
BB 1101
Dexamethasone 21-phosphate
Dexamethasone acetate
Anti-Bacterial Agents
Anti-Infective Agents
Anti-Inflammatory Agents
Antineoplastic Agents
Antineoplastic Agents, Hormonal
Antiviral Agents
Autonomic Agents
Central Nervous System Agents
Enzyme Inhibitors
Free Radical Scavengers processed this record on April 26, 2015