A patient undergoing photodynamic therapy using the dye verteporfin must follow precautions to prevent:
A) Exposure to strong light
B) An infection in the eye
C) Orthostatic hypotension
D) A food-drug interaction
Ans: A
Feedback: Patients undergoing photodynamic therapy that uses the light-activated dye verteporfin should be cautioned to avoid exposure to strong light for 5 days after treatment. This includes bright sunlight, tanning booths, halogen lights, and the bright lights used in dental offices and operating rooms. Ordinary indoor light is not a problem. If a patient must go outdoors within the first 5 days after treatment, he should be counseled to wear long-sleeved shirts and slacks of tightly woven fabric, gloves, shoes, socks, sunglasses, and a wide-brimmed hat. Infection, a food-drug interaction, and orthostatic hypotension are not risks associated with the administration of this dye.
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