Since he started living on his own last year, my old chum consumes a worrying large amount of caffeine. 2 x 2 litre bottles of Coke, a mug of tea, ten cups of coffee and 1 mug of hot chocolate were consumed by him when he spent one day last weekend visiting me. This is typical daily consumption for him. (Even on a working day!) I have politely suggested he reduce his intake somewhat but this was ignored. This cannot be good for him. He seems to be easily enraged now and has difficulty sleeping. I know his sister and when he visits her she sneakily gives him de-caff when she can get away with it and he does not seem to notice the difference. What can I do?
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