Possible Clues:

• Drink, getting less than half tipsy - sober later
• Herbal tea drink
• Barley drink makes girl sit up
• It is an infusion with an E
• Herb-tea
• Seems that it is an E that makes it turn mentally OK
• The drink in prospect is a new one
• Drink a variety of retsina after opening
• Brown drug poured over one's herbal tea
• Barley tea