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The Week Before Surgery

The final seven days: pre-op testing, the last diet stage, sorting medications with your team, and getting your home ready.

By Alex Brecher 2 min read Medically reviewed by the BariatricPal editorial team, August 2026

The last week before bariatric surgery is mostly logistics. Most of the big decisions are already behind you, and what is left is making sure nothing is forgotten while you are focused on the operation itself.

Pre-op testing

Most programs complete their testing in the final weeks. Depending on your surgeon and your health history, this can include bloodwork, an EKG, a chest X-ray, an upper endoscopy, a sleep study, or a nutrition and psychology review. Your team will tell you which of these apply to you and when the results need to be back. If anything is still outstanding, chase it early in the week rather than the day before.

Medications

Your surgical team will give you specific instructions about which medications to continue, adjust, or pause before surgery. This commonly comes up with blood thinners, anti-inflammatories, and diabetes medications, but the instructions are individual and depend on your prescriptions and your procedure. Do not stop or change anything on your own. Bring a written list of everything you take, including supplements and over-the-counter products, and confirm the plan directly with your team.

The last stage of the pre-op diet

The pre-op diet is usually strictest in the final days, and many programs move to clear liquids for the last 24 hours. This is the part people find hardest, partly because nerves are building at the same time. Keep cold liquids within reach, plan quiet days if you can, and remember the point of it is to shrink your liver and make the operation safer.

Getting your home ready

You will not feel like shopping or organising when you get back. Before you go in:

  • Stock the liquids and protein your program has approved for your first stage
  • Fill any prescriptions your surgeon has sent ahead
  • Set up a comfortable spot with a charger, water, and anything you need within arm's reach
  • Put a pill organiser together so you are not sorting bottles while sore
  • Do the laundry and batch anything you would normally do in the first week

The practical arrangements

Confirm your arrival time and where to park. Arrange who is driving you home, since you will not be able to drive yourself. Sort childcare, pet care, and time off, and let work know how long you expect to be out. Pack your bag a couple of days early so it is not a rush.

Nerves are normal

Almost everyone gets second thoughts in the final week. That is a normal response to a major operation, not a sign you have made the wrong decision. If the worry is keeping you from sleeping or you want to talk it through, your program's coordinator has heard all of it before, and the community forums are full of people who were in exactly this week not long ago.

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