Which of the following is NOT a photosensitivity offender according to the material?

• A. Sulfonamides
• B. Tetracyclines
• C. Amiodarone
• D. Acetaminophen

Answer: (D)

Photosensitivity reactions happen when some drugs absorb UV light and trigger skin damage on sun exposure. Two main mechanisms are phototoxic reactions (dose-related and sunburn–like) and, less commonly, photoallergic reactions (immune-mediated).

Sulfonamides and tetracyclines are classic phototoxic offenders because their structures can absorb UV light and generate reactive species that injure skin. Amiodarone is another well-known offender and can cause noticeable phototoxic changes, sometimes with a distinct skin discoloration after sun exposure.

Acetaminophen does not typically cause photosensitivity reactions. Its usual concerns are liver toxicity in overdose, not skin reactions triggered by light. Therefore, acetaminophen is not considered a photosensitivity offender according to the material.