How can you have someone committed to a mental institution?

My brother is 50 years old and a drug addict. He lives off my 67 year old mother. He has had heart attacks and strokes but continues to do drugs daily. How can I have him committed to a drug treatment center or better yet a mental health institution because he is mental and he has no control over his life or his addictions. I live in Ohio. Serious answers only please.

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