Some suggested uses for catnip are the following. Some cats can be exceptions to this rule as they will slowly increase their sensitivity over the years. Cats cant overdose on catnip and once a cat has experienced a catnip high it will not be responsive to additional catnip for several hours.
Nepeta cataria is often called catnip or catswort as it attracts felines. Some cats become aggressive on catnip as well and in this case I recommend keeping them off it. You may also give your cat some fresh catnip to chew on before a stressful event. In fact being exposed to catnip too frequently can actually make cats less susceptible to its effects.