50.1 MB (50.0 MB compressed)
5120 x 3417 pixels
43.4 x 29.0 cm ⏐ 17.1 x 11.4 in (300dpi)
DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
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Close up of ulcers (inflamed whitish patches) in the mouth of a 52 year old man due to an allergic reaction to trimethoprim. Trimethoprim is an antibiotic drug commonly used to treat urinary tract infections, prostatitis and bronchitis. As well as oral ulcers, reactions to this drug can include rash, fever, sore throat, headache or diarrhoea. Treatment of such drug reactions involves withdrawal of the causative drug.
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