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Genralized body weakness after alcohol drinking can be due to hypokalemia and concomitten hypomagnesemia.
Other things is alcoholic neuropathy in which too patient can have muscle problems like weakness, cramps, aches or spasms.
Chronic alcohol consumption depletes body of vitamins and minerals. Due to which weakness can develop.
Degeneration of muscles can also occur called alcoholic myopathy making upper arms and thighs weak and painful can also held responsible.
Metabolic derangements can occur in patients with chronic alcohol exposure withdrwal or acute intoxication.
Most important and serious abnormalities are hypokalemia hypomagnesemia hypophosphatemia hypoglycemia ketoacidosis and lactic acidosis
This serious complication can lead to genrealized weakness which needs prompt adressing

Serum elctrolytes including Mg and Ca leves, blood sugar, ECG should be done

Have good and balance diet reduced or stop alcohol consumption altogther and if you are lactating mother then that would need extra amount of calories in your diet. Take good care of your self alcohol is very damaging to health it affects almost every system of your body.

Hope it will help

Thanks

wishing you best of health

Dr M.S Khalil

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