The plot of the classic science fiction short story, Flowers for Algernon
has been adapted into a wide range of other stories, TV shows and movies. Upgrading a person's intelligence through some unnatural means provides a temporary fix -- resulting in an addiction to intelligence augmentation (or other complications). In reality, some colleges are starting to deal with students abusing drugs meant to treat ADHD but which also seem to increase mental focus in general. However, other methods that don't use prescription medication to boost brainpower might be harder to regulate. Here are just a few links on the subject of boosting brainpower.
If you'd like to read more awesome and interesting stuff, check out this unrelated (but not entirely random!) Techdirt post