Our expert says:
They ought to be cautious. Substantial alcohol consumption can cause brain damage in its own right, and presumably more so in a brain already damaged. And it could interfere with the effectiveness of medications the person might be needing for other good reasons, and contributes to the development of depression. Also, one might become more sensitive to the effects of alcohol with brain damage, and thus become more drunk, more easily than one expects.
It is possible, also, depending on the extent and location of the brain damage caused by the accident, that their ability to control their impulses may have been impaired, so it may have become more difficult for them to control their drinking. SO the problem could be complex, and well worth discussing with their neurologist.
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