(HealthDay News) -- Here are the latest clinical trials, courtesy of CenterWatch:

Interstitial Cystitis

If you are 18 or older, and have had moderate-to-severe pain, pressure or discomfort due to painful bladder syndrome for at least six months, you may qualify for this study.

The research site is in Mountlake Terrace, Wash.

More information

Please see http://www.centerwatch.com/patient/studies/cat89.html.

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Vaccines

If you are 68 or older and had a pneumonia vaccine at least three years ago, you may qualify for this study.

The research site is in San Antonio, Texas.

More information

Please see http://www.centerwatch.com/patient/studies/cat372.html.

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Rheumatoid Arthritis

If you are 18 or older and have been diagnosed with rheumatoid arthritis for six months or longer, you may qualify for this study of an investigational drug.

The research site is in Clearwater, Fla.

More information

Please see http://www.centerwatch.com/patient/studies/cat132.html.

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