Xanax and clonazepam are medicines that works by slowing down a person's central nervous system. These are part of a drug family called benzodiazepines. Physicians tend to recommend them for treating panic and anxiety disorders. Clonazepam is also a benzodiazepine and is sold under the brand name Klonopin. Physicians use this to treat seizure conditions in children and adults alike. It can help combat chemical brain imbalances and raise the frequency of heart attacks, too. One can easily buy clonazepam online as the drug is widely used and does not require any prescription.