You can't stop all the drug abuse but the extent of use is not a given. Amphetamine use of UK students appears to be extremely rare compared to the US, its never really been a cultural thing here.

I suspect it is due to very few amphetamine drugs being prescribed, especially to children. It seems to common to hear about people selling their legitimate ADHD/ADD prescriptions to friends in the US. "Speed Paste" is the only amphetamine properly in circulation and its use is mostly restricted to the hardcore "junkie" groups, very much frowned upon from the casual drug community.

None of the above is a solution, just to note the degree to which groups will gravitate towards and use a drug is not a given. Culture and availability probably affect use massively.