Alcoholic (3.5e Flaw)
From D&D Wiki
You need to drink to get through the day.
Effect: The character must drink during the time they are awake. Each hour they do not have a drink, they must make a Will Save with a DC rating of 10+ their level check to not become Fatigued. Each hour the difficulty rating is increased by 2, until they have a drink.
If the character continues to deny themselves a drink and fails their Will Save, they then become Exhausted.To remove the Exhausted or Fatigued state, the character must have two drinks per failed Will Save.