SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Lichenoid rash from drug. Close-up of raised red patches on a patient's skin, similar to the rash seen in lichen planus, caused by use of the anti-arthritis drug hydroxychloroquine. Hydroxychloro-quine is used to treat malaria and, where other treatments have proved ineffective, severe rheumatoid arthritis. Side-effects include nausea, headaches, diarrhoea, rashes, abdominal pain and damage to the retina of the eye.
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