Can you read the following sentence?

"it deosn't mttaer in waht oredr the ltteers in a wrod are the olny iprmoatnt tihng is taht the frist and lsat ltteer are in the rghit pcale" Surprisingly, many people can. This may explain why the following similar-sounding drugname pairs were frequently involved in errors / near misses in a recent survey of Irish hospitals.

IMSN Briefing Document on Sound Alike Look Alike Drugs (SALADs)