Now that it’s finally become clear you should never drink tea or coffee served aboard an aircraft (to avoid pathogens), it’s the turn of alcohol consumption at high altitude, even if it is pressurized, to be deemed highly inadvisable. A scientific study has recently brought to light the “unexpected” effects of “normal” alcohol consumption on a long-haul flight.
https://www.lefigaro.fr/voyages/conseils/pourquoi-boire-de-l-alcool-en-avion-est-toujours-une-mauvaise-idee-20210112