Preparing for surgery starts well before the day of your procedure, often weeks in advance. The steps you take during that window, from adjusting medications to setting up your home for recovery, directly affect how smoothly the surgery goes and how quickly you heal. Here’s what to do and when to do it.
Pre-Operative Tests Your Team Will Order
Your surgical team will order tests based on the type of surgery, your age, and your health history. Not everyone gets every test, but common ones include a complete blood count (CBC) to check for anemia or infection, blood clotting studies, kidney function tests, and blood sugar levels. If you’re of childbearing age, expect a pregnancy test, since pregnancy changes how anesthesia and medications are managed.
An electrocardiogram (ECG) records your heart’s electrical activity and can reveal abnormal rhythms or signs of heart muscle damage. A chest X-ray may be ordered if you have a history of shortness of breath, chronic cough, or heart or lung problems. These tests are typically scheduled at a pre-operative appointment one to two weeks before surgery, giving your team time to address any issues that come up.
Medications and Supplements to Adjust
One of the most important conversations you’ll have before surgery is about what to stop taking and when. Blood thinners, anti-inflammatory painkillers, and certain diabetes medications all need to be paused on specific timelines. Your surgeon’s office will give you individualized instructions, but you should bring a complete list of everything you take, including over-the-counter drugs.
Supplements deserve special attention because many people don’t think to mention them. Herbal products like St. John’s wort, echinacea, ginseng, and grapefruit extract can interact with anesthesia drugs or affect how your blood clots. A panel of experts reviewing the evidence in Mayo Clinic Proceedings recommended stopping most supplements at least two weeks before surgery as a default when specific safety data wasn’t available. Some, like 5-HTP, only need a 24-hour hold, while others require the full two weeks. If you take a combination product that contains any supplement on the hold list, the entire product should be stopped.
If you have diabetes, the American Diabetes Association recommends holding metformin on the day of surgery. A class of diabetes drugs called SGLT2 inhibitors should be stopped three to four days beforehand. Long-acting insulin doses are typically reduced to 75 to 80 percent the night before or morning of surgery. Your blood sugar target in the hours around your procedure is 100 to 180 mg/dL, and your team will monitor it every two to four hours while you’re fasting.
Fasting Rules Before Anesthesia
Your stomach needs to be empty for anesthesia. If it’s not, you risk inhaling stomach contents into your lungs during the procedure, which is a serious complication. The American Society of Anesthesiologists sets the standard timelines: clear liquids (water, black coffee, apple juice without pulp) are allowed up to two hours before your procedure. A light meal or non-dairy milk requires at least six hours. Fatty foods, fried foods, or meat need eight hours or more.
Many hospitals now participate in Enhanced Recovery After Surgery programs that encourage patients to drink a clear carbohydrate-rich beverage the night before or morning of surgery rather than fasting from midnight. Preoperative carbohydrate loading reduces insulin resistance after surgery, preserves muscle, and helps patients feel better going in. If your surgical team offers you a carbohydrate drink, it’s not bending the fasting rules. It’s a deliberate strategy backed by strong evidence.
Quit Smoking at Least Four Weeks Out
Smoking impairs wound healing and lung function, both of which matter enormously during and after surgery. The American College of Surgeons notes that these effects begin to reverse within four to eight weeks of quitting. That means if your surgery is scheduled six weeks from now, stopping today gives your body meaningful time to recover its healing capacity. Even a shorter period of abstinence is better than none, but four weeks is the minimum target for real improvement in complication rates.
Reduce Your Infection Risk
Surgical site infections are preventable, and part of that prevention starts at home. The World Health Organization recommends a full-body wash with soap or an antiseptic cleanser before your operation. Your surgical team may give you specific antiseptic wipes or soap to use the night before and morning of surgery, with instructions on how to apply them. Follow those instructions carefully, paying attention to the area around the surgical site.
Manage Pre-Surgery Anxiety
Feeling anxious before surgery is extremely common and worth addressing rather than powering through. A 2023 study in JAMA Network Open found that virtual reality programs simulating the surgical environment helped reduce anxiety and stress in patients awaiting elective surgery. The exposure allowed people to become familiar with what the operating room looks and feels like, reducing the fear of the unknown.
You don’t need a VR headset to apply the same principle. Ask your surgical team to walk you through exactly what will happen on the day of surgery: where you’ll check in, what the operating room looks like, what you’ll feel as anesthesia starts, and what you’ll experience waking up in recovery. Knowing the sequence of events removes a surprising amount of dread. Deep breathing exercises, guided meditation apps, and even just talking through your worries with someone you trust can also help.
Paperwork and Insurance
Before your procedure, you’ll sign an informed consent form. This isn’t a formality. Your medical team will explain why the surgery is recommended, what the specific risks are, and what to expect afterward. You’ll also sign a separate consent for anesthesia. Read both carefully and ask questions about anything that’s unclear.
You may also be asked about advance directives, which are legal documents stating your treatment preferences if you become unable to communicate. There are two main types: a living will, which outlines your wishes about life support, and a healthcare proxy, which names someone to make medical decisions on your behalf. You’re not required to have these, but the hospital will ask.
On the insurance side, check with your plan about your share of costs before the procedure. If the surgery is elective, your insurance company may require precertification from your doctor before approving it. Call your insurer early enough to avoid last-minute surprises about copayments, deductibles, or out-of-network charges.
Set Up Your Home for Recovery
The time to prepare your home is before surgery, not after, when you’ll be groggy, sore, and possibly unable to bend, reach, or climb stairs. The goal is to create a setup where everything you need is within easy reach on one floor.
Start with the basics: move your sleeping arrangement to the entry-level floor if your bedroom is upstairs. Make sure a bathroom or portable commode is on the same floor. Stock up on canned and frozen food, toilet paper, shampoo, and any personal care items so you won’t need to shop during early recovery. Place food, dishes, and supplies in cabinets between waist and shoulder height so you don’t have to bend or stretch overhead.
The bathroom is where most post-surgery falls happen. Install grab bars near the toilet and inside the shower or tub, secured vertically or horizontally to the wall (not diagonally, and never use towel racks as substitutes). Place non-slip suction mats inside the tub and a non-skid bath mat outside it. A raised toilet seat and a shower chair with non-skid rubber tips on the legs make a significant difference in safety and comfort.
Throughout the house, remove loose throw rugs, tuck away cords and wires from walkways, fix any uneven flooring in doorways, and add night lights to hallways and dark rooms. If you’ll be using a walker, attach a small basket to carry your phone, notepad, and essentials. Other helpful supplies include a long-handled shoehorn, a reacher for picking things up from the floor, a sock aid, and a long-handled shower sponge. Place a sturdy, firm-backed chair in every room you plan to use.
The Day Before and Morning Of
The day before surgery, confirm your arrival time and location, lay out loose and comfortable clothing (ideally something that buttons or zips in the front rather than pulls over your head), and take your antiseptic shower if instructed. Arrange your ride home and make sure the person driving you can stay at the hospital or be reachable by phone. Most facilities will not discharge you to a rideshare or taxi after general anesthesia without a responsible adult present.
The morning of surgery, follow your fasting instructions precisely. Take only the medications your surgical team specifically told you to take, with a small sip of water. Leave jewelry, contact lenses, and valuables at home. Bring your photo ID, insurance card, and any paperwork your surgeon’s office requested. Arrive at the time you were given, which is typically one to two hours before the actual procedure to allow time for check-in, pre-op nursing assessment, and IV placement.