It can be well treated with homeopathic medication and counseling sessions effectively and without any side effects. He may need medication for long time.

Hi... Escitalopram is a Selective Serotonin Reuptake Inhibitor (SSRI) commonly prescribed for stress, anxiety, depression symptoms. These are so common that anyone can be taking it. What if you marry a person who is suffering from some physical/mental health illness and is not taking any treatment, than can we say that, he is healthy? Please google Depression in India - WHO study 2015. You will get the figures and understand how common these issues are these days.

If you are talking about Citalopram tablet, it probably is a drug used in the treatment of depression. Your partner taking it gives an indication that he is probably under treatment for depression. I would suggest you to ask for the details of the matter from your partner. If you are getting them in a reliable way, please confirm about his condition from a psychiatrist. It may be worthwhile to consult a psychiatrist to know more about your partner's condition even if he is not coming forth with clear information on his treatment. You may take appropriate decision after clarifying the entire matter.