Catnip (Nepeta cataria) is a member of the mint family. It's sometimes referred to as Catmint. Even though it seems to produce a euphoria response in cats, catnip will not get you high! Here's an excellent explanation of why it works for cats though.
Catnip has a much milder effect on people but it still produces many desired effects. There are many reasons why you should grow catnip for yourself: