Klonipin and Ativan
are what we called as benzodiazapines, a class of drugs which are addictive in long run i.e more than 4-6 weeks. In view of this, guidelines say that they should not be more than that. Also, they help with the symptoms but not the root cause of anxiety
. Hence, it is only a temporary measure. And in view of the tolerance developed by the body, you will need increasing dose of these medicines for ever. Hence the advice is to go for medicines which target the root cause under guidance of doctor or talking therapies if you don't like medicines, both of which can provide long term help.