Which therapeutic drug is known to provoke photosensitivity______________?
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Answer: A. Tetracycline
Explanation
Tetracycline molecules absorb ultraviolet radiation and generate reactive oxygen species within skin tissues. These phototoxic reactions lead to painful sunburns and exaggerated cutaneous inflammation upon sun exposure. Patients taking this antibiotic class must protect their skin from direct sunlight. Tetracyclines are broad-spectrum antibiotics inhibiting bacterial protein synthesis by binding ribosomes. Photosensitivity occurs when specific drugs accumulate in the skin and react with light energy. Ultraviolet A wavelengths are typically responsible for triggering these drug-induced cutaneous manifestations.
Dermatologists advise patients starting acne regimens involving tetracyclines to apply high-factor sunscreens. Travelers visiting sunny climates face higher risks of developing unexpected severe sunburns while medicated. Proper patient counseling prevents unnecessary discomfort and discontinuation of essential antimicrobial therapy. Aminoglycosides primarily target Gram-negative bacteria and cause ototoxicity rather than cutaneous photosensitivity. Penicillins belong to the beta-lactam class and commonly trigger allergic rashes instead of phototoxicity. Cephalosporins are structurally related to penicillins and rarely exhibit direct ultraviolet-induced skin reactions.
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