This is not a concern I have invented: http://www.ncpoisoncenter.org/body.cfm?id=115 http://voices.yahoo.com/separating-candy-medicine-prevent-me...
They specifically call out parents calling medication "candy". This is apparently something that parents do with enough frequency to warrant calling out. As far as I am concerned, candy-like vitamin supplements are no better.
I would suggest that prescription medication manufactures stop making medicine in bright colors and fun shapes, however I suspect the harm done by such a suggestion in the form of accidental adult poisonings would outweigh the benefits.
I would therefore argue, were I inclined to, that candy and vitamin companies should modify their products. I would not advocate prescription medication companies altering anything.
So my thesis: confusion between medication and candy kills thousands of children every year. There are trivial things we can go after in an attempt to curb this phenomenon (to repeat: tell vitamin and candy companies to knock it off). Nobody is calling for these trivial measures, even though they seem greatly concerned about a problem with much smaller magnitude. The reason for this incongruity is that candies and vitamins are familiar, while magnet toys are new and striking.