(HealthDay News) -- Here are the latest clinical trials, courtesy of CenterWatch:
Asthma
People with asthma who are taking an inhaled corticosteroid may qualify for this study at the National Institutes of Health Clinical Research Center. The study will evaluate whether a widely used agent for diabetes can improve asthma.
The research site is in Bethesda, Md.
More information
Please see http://www.centerwatch.com/patient/studies/cat16.html. 
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Migraine and Cluster Headaches
To qualify for this study, you must be aged 18 to 65, diagnosed at least three months ago with migraines that occur at least once monthly, and currently treating your migraines with Fioricet. Additional criteria may apply.
The research site is in Deland, Fla.
More information
Please see http://www.centerwatch.com/patient/studies/cat100.html.
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Depression
You must have symptoms of depression to qualify for this study of an investigational medication. Participants will receive all study related care and study medication at no cost, and may be compensated for time and travel.
The research site is in Las Vegas, Nev.
More information
Please see http://www.centerwatch.com/patient/studies/cat164.html.
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