DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Drug-induced vascular spasm affecting the fingers of an 88-year-old man's hand. The tips of the fingers at bottom have turned pale due to the reduction of the blood supply by the spasms in the blood vessels. The spasms have been caused by beta-blocker drugs, prescribed to treat the patient's heart condition. The fingers will feel cold and numb due to the reduced blood supply.
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