What alcoholic beverage does not give you a headache or hang-over

Bombay Sapphire is recommended.

with tonic and lime 
                                                             

from research I believe most of the poison in alcohol is in whiskey and beer..popular bear brands.

to avoid as much poison as one can if one insists on drinking is to look at the manufacturers.  if the manufacturers are not Kosher a risk to drink might be considered.  definitely not if it is kosher made.

chinese vodka is a probability to be free of Kosher.  Russian..I don't know! Likely there too.  definitely not west indian rums..with the possible exception of a Bajan Brand like Cane Brandy..or Sugar Cane Brandy.  that used to be a fine rum.  I don't know it any more and its current quality.  no other west indian rum was worth i in my time.

nd good German commercial beer is ok as far as I have experienced it.  avoid the global brand BECK's.  that's totally disgusting.  but  the brands made inside Germany and sold in their stores that I have had were mind-blowingly good.  it was a revelation to drink those bears let me tell allyuh.  too bad I don't drink anmore

bush rum