This definition provides a clear distinction between a medical device and other FDA regulated products such as drugs. If the primary intended use of the product is achieved through chemical action or by being metabolized by the body, the product is usually a drug.
Salex lotion is used for: Removing excess skin in certain conditions, including calluses, psoriasis, and warts. It may also be used for other conditions as determined by your doctor. Salex lotion is a topical salicylate. It works by causing the skin to swell, soften, and then slough or peel in areas where it is applied.
Keep in mind that different things work for different people. My wife tried the Corn Huskers Lotion herself, and said that it did not work as well on her hands as it did on mine. It's possible that it all depends on skin type, as well as what one is used to with a hand cream or lotion.