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is a mood disorder
. It is characterized by pervasive sadness of mood, loss of energy, lack of interest in any activities as core features. Change in voice is not a common feature in depression or it is also not a side effect of commonly used antidepressants. He is on antidepressants and antianxeity medicines and has increased sleep. EEG came normal. Most likely his change in voice is due to some dissociative disorder
superimposed on depression. A detailed evaluation by a Psychiatrist
is must for treatment. I would advise you to take him to a Psychiatrist for evaluation.
Dr. Seikhoo Bishnoi, MD