Generic Celexa or Citalopram drugs are used for the treatment of depression. This medication is used for treating patients with main depressive disorder. Celexa is not to be used if you have bipolar disorder because it can worsen mania or cause a quick swing from the depressive to the hyper stage. Celexa effectively works by growing the quantity of neurotransmitter serotonin in the brain by stopping the resorption of serotonin from the synapse. This drug has a small effect of extra receptors; this is the reason for being called a selective serotonin reuptake inhibitor (SSRI). Neurotransmitters like serotonin are implicated in the parameter of ache, enjoyment, nervousness, fear, stimulation, and sleep manners. Citalopram or Celexa is less effective on additional neurotransmitters like dopamine and noradrenalin.