May I suggest a psychotherapy group for your Mom or individual therapy. If there is a prolonged [greater than 6 month] period of diminished appetite with weight loss, I would consider medicines.
From a different perspective, please allow the following:
There needs to be a careful biological work-up to ensure that you do not have certain neuroendocrine diseases that present as depression. Because depression is defined in terms of its presentation without a known biological marker it is essential that there is meticulous study of your presentation clinically to be certain that a correct diagnosis has been made. It is a terrible decision to initiate medication with an incorrect diagnosis.