@kaigangio,
Vodka

It is not the methanol itself that is poisonous, rather the formaldehyde that it is converted to by the enzyme alcohol dehydrogenase before it turns it to formic acid. The enzyme catalyses both the forward and reverse reaction and formaldehyde is just an intermediate.

The enzyme has a higher affinity for ethanol. Therefore taking your Tusker/Pilsner increases the concentration of ethanol in your blood, causing the enzyme to convert fomaldehyde back to methanol as it seeks to 'attack' the ethanol.

Downside (or benefit depending on how you look at it) is that you will have to maintain an elevated level of ethanol (stay drunk) until all the methanol is released from your body. And that can take a while as your body is poor at removing methanol.

As a side note:
Did you know that some people are genetically pre-disposed to alcoholism due to the conformation/type of alcohol dehydrogenase their body produces?

but how given the medical guys will first check
for your random blood sugar level which, if you have been imbibing, is low and hence you are given some sugar solution (dexstrose)?

And yuk, that formaldehyde is for preserving dead bodies!