Casual health-related observation. 羽目を外す ('to let loose, to go wild, to get carried away,' literally 'to take off the frame/harness') is a set idiom for letting go of restraint — often in drinking contexts. 二日酔い ('hangover,' literally 'two-day drunk'). 杜仲茶 ('Eucommia tea'), a Chinese herbal tea said to help with various ailments. 割り ('mixed, diluted with') is used for drinks mixed with something else.