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A gel that "sticks" to affected tissue and delivers medicine gradually over time could help treat some inflammatory bowel problems, researchers say.
Patients with ulcerative colitis often have to rely on medicine given by enema, but this can be uncomfortable, messy and inconvenient.
Now a US team has developed a hydrogel that attaches to ulcers and slowly releases a drug to help treat them.
The early findings are reported in the journal Science Translational Medicine.
Ulcerative colitis is the most common form of inflammatory bowel disease and mainly affects young people.
It causes inflammation and ulceration of the inner lining of the rectum and colon.
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