What to do with him

I have a hard time dealing with a person in my life. This person is lazy. When it comes time to do any work, he runs off or just sits there. He runs to the kitchen every 5 min and comes back out with food. I tried controlling that, but once the family goes to bed, he gets up and sneaks into the kitchen and gets food. He does not want to get a job cause he is like I said lazy. My husband and I have to get him up and make sure he takes his medication. He will forget appointments on purpose and then blames it on us. We have tried talking to him and setting rule, but that don't work. I wish I knew what to do. He is like a kid in a adult body.