Clonazepam is used to treat fits (epilepsy or seizures) and sudden, unexpected attacks of extreme fear, and worry about these attacks (panic disorder) with or without the fear of public places (agoraphobia).
Escitalopram is used for the treatment of depression (major depressive episodes), obsessive compulsive disorder, anxiety disorder and panic disorder.
Clonazepam belongs to a group of medicines called benzodiazepines. The exact mechanism of action of clonazepam is unknown; it is however believed to enhance the action of a signaling chemical called gamma aminobutyric acid (GABA) in the brain, which helps to calm the excessive electrical nerve activity that is responsible for causing fits (seizures) and panic disorders.
Escitalopram belongs to a class of antidepressant medications called SSRIs (selective serotonin reuptake inhibitors). Escitalopram acts on the serotonin-system in the brain and increases the serotonin levels (chemical responsible for maintaining good mental health), thereby regulating mood.