While I broadly support legalizing drugs to make them safer and get the business out of the hands of organized crime, hard drugs do pose some problems.
Take cocaine. Not only can it be extremely habit-forming (and expensive) for those inclined to addictive behaviour, even casual use poses significant health risks. A 45 year old who hasn't used in a while might think he's good to do a couple lines on a special occasion after having a few drinks. But he's incurring a significant risk of a cardiac arrest - a higher level of risk than any legal, over-the-counter drug sold today poses. So I don't know how you'd fit cocaine into our existing safety regulations around commercial products.
http://www.dailymail.co.uk/health/ar...imes-year.html