Drinking Fluids

Water and Other Fluids

Water is essential before and after surgery. It is found in every cell of your body and functions in many important ways.


  • Helps break down stored fat.
  • Promotes kidney function and helps rid the body of waste.
  • Is the best treatment for fluid retention.
  • Maintains proper muscle tone and helps prevent sagging skin.
  • Helps relieve constipation.

After surgery it may be hard to keep up your fluids.

  • Sip water and other fluids often between meals for the first few weeks.
  • Keep a record of your fluid intake.
  • Stop drinking about 30 minutes before meals. You may drink again 30 minutes after meals.
  • Your initial goal is 32 to 48 ounces. A better level is 64 ounces.

Carbonated Drinks

Avoid carbonated drinks. Carbonated drinks may cause painful gas and give a false sense of fullness. Even flat carbonated drinks may cause discomfort.

Caffeine Drinks

Avoid caffeinated drinks.

Caffeine causes:

  • Stomach irritation
  • Increases acid production in the stomach
  • Unwanted stimulation of the heart
  • Loss of fluids

These drinks contain caffeine:

  • Coffee, cappuccino, and other flavored coffee drinks
  • Energy drinks
  • Soft drinks
  • Tea: black, green and oolong. Check with dietitian on herbal tea.


Avoid alcohol for at least the first six months after bariatric surgery.  Alcohol is absorbed faster and results in a higher blood alcohol level. Also, alcoholic drinks are often high in calories and can contain sugars or carbonation. Use caution if you choose to drink.  The effects of alcohol will be more intense.  Always check with your physician before consuming alcohol after your surgery.

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