(HealthDay News) -- Here are the latest clinical trials, courtesy of CenterWatch:
Erectile Dysfunction
If you are a male and at least 19 years old with a history of erectile dysfunction, have had success with Viagra, Cialis, or Levitra during the past six months, and expect to be in a relationship with a female partner, you may qualify for this study.
The research site is in Huntsville, Ala.
More information
Please see http://www.centerwatch.com/patient/studies/cat371.html. 
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Lupus
If you have a positive ANA result at your first clinic visit and have a current diagnosis of systemic lupus erythematosus (SLE) using American College of Rheumatology revised criteria, you may qualify for this study. If on antimalarials, the dose regimen must be stable for four weeks prior to study entry.
The research site is in Lebanon, N.H.
More information
Please see http://www.centerwatch.com/patient/studies/cat384.html.
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Shingles
If you are aged 50 to 59, you may be eligible to participate in this study.
The research site is in Scottsdale, Ariz.
More information
Please see http://www.centerwatch.com/patient/studies/cat225.html.
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