Which of the following drugs is known to cause photosensitivity?

Photosensitivity refers to an increased sensitivity to sunlight, which can lead to adverse skin reactions when exposed to UV radiation. Several classes of medications are known to cause this phenomenon due to their effects on the skin and how they interact with ultraviolet light.

Ciprofloxacin, a fluoroquinolone antibiotic, is known to cause photosensitivity reactions, leading to symptoms like skin rash or sunburn when patients are exposed to sunlight. Similarly, sulfonamides, a group of antibiotics, can also trigger photosensitivity, causing patients to develop rashes or other skin reactions upon sun exposure. Norfloxacin, another fluoroquinolone, falls into the same category as ciprofloxacin regarding photosensitivity.

Because all three of these drugs—ciprofloxacin, sulfonamides, and norfloxacin—are known to increase the risk of photosensitivity, the answer indicating that all of the drugs listed can cause this side effect is correct. This knowledge is crucial for patient education, as healthcare providers should inform patients about these risks to help prevent painful and potentially serious skin reactions while using these medications.