Been taking klonopin (clonazepam) for a while at night for anxiety. lately i have been having more anxiety after it takes effect. what's that about?

Tolerance?: You could be having tolerance to Clonazepam (Klonopin), taking more to achieve desired effects. Related to this is the pharmacodynamics and kinetics of benzodiazepines (similar to alcohol) in that as your body metabolizes the drug it increases agitation which can result in seizures (in extreme cases). Consider alternative treatments for anxiety including other medication options and psychotherapy.