My first idea was that some of the pesticides in different medications might block or interact with each other, which is the reason why you usually get conditio

My first idea was that some of the pesticides in different medications might block or interact with each other, which is the reason why you usually get conditioner and shampoo in two bottles (the chemicals in most conditioners are cationic while the ones in shampoos are anionic) Having now looked through quite a few Wikipedia articles of the pesticides used, I can't find no such statements... Except that I learned that some of these have a vague link to CCD. Another thing is that the application time-scale and use-cases between these drugs differs - some you give every 6 months or so as prophylaxis, some you only give when there's an actual infection.