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One for the road

In relation to your reply about home breathalysers, your readers should be aware that such kits are prone to false negatives (and false positives for that matter). Irrespective of what concoctions you take in an effort to counteract the after effects of alcohol, the liver still takes 1 hour to dissipate 1 unit of alcohol (1/2 pint, glass of wine, tot of rum etc.). There is no such thing as 'hair of the dog' and copious amounts of black coffee or antioxidants will not affect this process. The only ways to ensure not being over the prescribed limit is either not to drink/drive at all or to undergo a blood/urine laboratory test.

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Except that they were tested by 5th Gear and Alcosense repeatedly gave the same performance as police breathalysers. 8 hours is 8 units of alcohol, anyway. 4 hours is 4 units. Drink 2 glasses of wine with a meal over 3 hours and you will have dissipated all the alcohol. I'm not talking here of alcoholics. Just moderate drinkers.
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