My friend has symptoms of bi-polar/manic depression or hyperthyroidism, but doesnt. What could it be?

He was given drugs for manic depression about a year ago but they didnt do anything. I dont think he has either of these diseases, but im sure hes got something. Can anyone help? Thanks xx

My friend has symptoms of bi-polar/manic depression or hyperthyroidism, but doesnt. What could it be?

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