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Is Pentoxifylline Able to Improve Olfactory Sensitivity?
This study is currently recruiting participants.
Study NCT00660868   Information provided by Dresden University of Technology
First Received: April 16, 2008   Last Updated: January 29, 2009   History of Changes

April 16, 2008
January 29, 2009
November 2007
November 2009   (final data collection date for primary outcome measure)
TDI-score [ Time Frame: at day 0 and follow up after 3 weeks ] [ Designated as safety issue: No ]
Same as current
Complete list of historical versions of study NCT00660868 on ClinicalTrials.gov Archive Site
odor threshold odor discrimination odor identification [ Time Frame: at day 0 and at follow up after 3 weeks ] [ Designated as safety issue: No ]
Same as current
 
Is Pentoxifylline Able to Improve Olfactory Sensitivity?
Agapurin Retard Used in Patients With Smell Disorder- A Post-Marketing Observational Study

Signal processing in the olfactory neuron could be influenced by inhibition of enzymes like phosphodiesterase. Pentoxifylline is a unspecific phosphodiesterase inhibitor. The hypothesis is that pentoxifylline could lead to increased sensitivity to odors.

Olfactory signal processing is conducted by a G-protein linked increase of intracellular concentration of adenosine 3´,5´-cyclic monophosphate (cAMP). In the cilia of olfactory sensory neurons (OSN) cAMP is degraded by phosphodiesterase 1C2 (PDE1C2). Inhibition of PDE1C2 could result in an increased response of OSN to chemical stimuli. Aim of the present prospective post-marketing surveillance study was to investigate the impact of pentoxifylline, an unspecific phosphodieasterase inhibitor, on olfactory function.

 
Observational
Other, Prospective
Olfaction Disorders
Drug: Pentoxifylline retard 400mg
Patients with posttraumatic, idiopathic, and postinflammatory cause of smell loss; patients age between 18 and 50 years. Odor threshold better than 1.
 

*   Includes publications given by the data provider as well as publications identified by National Clinical Trials Identifier (NCT ID) in Medline.
 
Recruiting
30
November 2009
November 2009   (final data collection date for primary outcome measure)

Inclusion Criteria:

  • hyposmic or functionally anosmic patients TDI-score <31
  • age: 18-50 years
  • odor threshold: better than 1
  • cause of smell loss: post traumatic, postinflammatory, idiopathic

Exclusion Criteria:

  • normosmic patients,
  • patients with contraindications for application of pentoxifylline
  • patients that cannot give written agreement to the study
  • patients under 18 years and over 50 years of age
Both
18 Years to 50 Years
No
Contact: Volker Gudziol, Dr. med. 49-351-458-4420 volker.gudziol@uniklinikum-dresden.de
Contact: Thomas Hummel, Prof. Dr. 49-351-458-4189 thummel@mail.zih.tu-dresden.de
Germany
 
NCT00660868
Gudziol, Dr. med., Smell and Taste clinic, Klinik für HNO- Heilkunde, Universitätsklinikum Dresden
EK157072007
Dresden University of Technology
 
Principal Investigator: Volker Gudziol, Dr. med. Technische Universität Dresden
Dresden University of Technology
January 2009

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP