Free iodine solutions in medical antisepsis have been replaced by which agents?

• A. Alcohol
• B. Iodophors
• C. Chlorhexidine
• D. Benzalkonium chloride

Answer: (B)

Iodophors are used because they combine iodine with a carrier to create a controlled, gradual release of iodine at the site of application. Free iodine solutions deliver a high, rapid dose of iodine but can be harsh on skin and mucous membranes, stain, and be less stable in the presence of organic matter. The iodophor complex provides antimicrobial action over a longer period while minimizing irritation and staining, making it safer and more practical for routine antisepsis, skin prep, and wound cleansing. Alcohol acts quickly and evaporates, lacking ongoing residual activity; chlorhexidine and benzalkonium chloride have their own distinct properties and spectrums of activity, but the shift away from free iodine in many settings specifically reflects the advantages of the slower, safer release offered by iodophors.