Clonazepam and Lorazepam are both classified as benzodiazepines. Benzos act by inducing sleepiness, relaxing muscles, to prevent anxiety from getting out of hand. Clonazepam is the generic name for Klonopin, and Lorazepam is the generic name for Ativan.
Clonazepam is mostly indicated for seizures and panic disorders, and Lorazepam is used for anxiety disorders. Clonazepam and Lorazepam both may be used for insomnia and treating epilepsy. Clonazepam is taken in two to three doses, while Lorazepam is taken in three to four doses.
Some say that Lorazepam is more addictive, while others say clonazepam is more likely to cause an addiction. However, it has been noted that clonazepam is stronger than Ativan, which means it makes the patient need more of it by the time it wears off.