The routine for beating any hangover not at least dented by a cup of tea and a cigarette is as follows -
A second cup of tea, because who knows you might get lucky this time...ideally coupled a mild intake of THC, then generally breakfast in the pub and two to three pints of Guinness to sooth the throat and settle any stomach issues.
Should all of that not beat the demons into submission, repeat the Guinness stage this time adding a single Tia Maria to each pint.