Buy Klonopin Online It is a benzodiazepine medication that boosts the activity and functions of certain chemical messengers, neurotransmitters, and GABA levels in the brain. GABA levels that are in balance relax the brain and nerve cells, reducing hyperactivity and anxiety symptoms. Klonopin is also useful in treating, controlling, and managing anxiety and panic disorders. This medication has an immediate effect and lasts for six hours.