Preparing for a root canal is mostly about a few practical steps the day before and the morning of your appointment. The procedure itself typically takes 45 minutes to 3 hours depending on which tooth is involved, so planning ahead makes the experience smoother and less stressful. Here’s what to do before you go in, and what to have ready at home for afterward.
Eat Before You Arrive (Usually)
If your root canal uses only local anesthesia, which is the numbing injection most people get, you can and should eat a light meal beforehand. You won’t be able to eat comfortably for several hours after the procedure, so going in on an empty stomach just means a longer wait until your next meal.
The exception is if you’re receiving oral sedation or IV sedation. In that case, fasting rules apply, and your dental office will give you specific instructions on how many hours to avoid food and drink. Don’t assume generic timelines are correct for your situation. If sedation is planned, ask whether coffee is included in the fasting window, because it often is.
Take Ibuprofen Before Your Appointment
Taking an anti-inflammatory painkiller before the procedure can make a real difference in how comfortable you are during and after treatment. Research supports taking 600 to 800 mg of ibuprofen about 45 minutes before your scheduled anesthesia injection. This helps reduce inflammation in the tooth’s nerve tissue, which allows the numbing agent to work more effectively. It also gives you a head start on pain control before the local anesthesia wears off later.
If you can’t take ibuprofen due to stomach issues, allergies, or other medications, let your dentist or endodontist know ahead of time so they can suggest an alternative.
Plan Your Ride Home
Whether you need a driver depends entirely on what type of sedation you’re getting. With local anesthesia alone, you’re fine to drive yourself. Your mouth will be numb, but your reflexes and judgment aren’t affected.
If you’re receiving nitrous oxide (laughing gas), you can likely drive shortly after, but wait until your dentist confirms you’re fully alert. Oral sedation lingers in your system for several hours, so you’ll need someone to take you home. IV sedation is more serious: you should not drive for at least 24 hours afterward, and you’ll want someone available to help you for the rest of the day.
Block Off Enough Time
Front teeth, which have a single canal, still take 45 minutes to an hour. Premolars run about an hour or slightly more. Molars, with their multiple canals, can take 90 minutes or longer. Plan to be in the chair for about 90 minutes as a baseline, even for simpler cases, once you factor in X-rays, numbing, and cleanup.
A crown is almost never placed the same day, so you won’t need to budget extra time for that. But do ask your dentist when the crown appointment should happen. Getting your permanent crown placed promptly protects the treated tooth and is one of the biggest factors in long-term success. A properly treated and restored tooth can last as long as a natural one.
Share Your Full Medical History
Bring a list of every medication you’re currently taking, including supplements and over-the-counter drugs. Certain medications, particularly blood thinners, can affect the procedure or your recovery.
Most people do not need antibiotics before a root canal, but a small group does. Current guidelines from the American Heart Association recommend preventive antibiotics only for patients at the highest risk of heart infection: those with prosthetic heart valves, a history of infective endocarditis, certain congenital heart defects, or a heart transplant with valve problems. If you have a joint replacement, antibiotics are generally not recommended before dental procedures. If any of these apply to you, confirm with both your dentist and your physician well before the appointment so the prescription is ready.
Stop Smoking If You Can
Smoking directly impairs healing in your mouth. Nicotine and other compounds in cigarette smoke constrict blood vessels around the tooth root, reducing oxygen delivery and slowing cellular repair. The blood of smokers carries elevated levels of carbon monoxide, which further decreases the oxygen available to healing tissues. This restricted blood flow can contribute to early tissue death within the pulp cavity, which is exactly the problem a root canal is trying to fix.
If you can stop smoking for even a few days before and after the procedure, you give the treated tooth a better chance. If quitting entirely isn’t realistic, cutting back as much as possible around the appointment still helps.
Stock Your Kitchen for Recovery
You won’t want to go grocery shopping with a numb mouth, so prepare your post-procedure meals in advance. Wait until the numbness fully wears off before eating anything, so you don’t accidentally bite your cheek or tongue.
For the first day or two, stick to soft foods:
- Breakfast options: scrambled eggs, yogurt, smoothies
- Filling meals: mashed potatoes, pasta, shredded meat, couscous
- Snacks: ripe or canned fruit, soft cheese, hummus, peanut butter on soft bread
- Soups: lukewarm (not hot) blended vegetable soups
- Treats: frozen yogurt or sorbet
Avoid sticky foods like taffy, caramel, or gum that could pull out your temporary crown. Skip hard foods like nuts, ice cubes, and hard candy that risk cracking the tooth. Keep food and drinks at a moderate temperature, since the treated area will be sensitive to extremes of hot and cold.
Questions Worth Asking Beforehand
Call your dentist or endodontist’s office a day or two before and ask a few specific things. First, find out what type of anesthesia or sedation they plan to use, since this determines your eating and driving plans. Ask about the expected length of your appointment so you can plan your day. Ask whether your tooth has a favorable prognosis, because in rare cases where the outlook is poor, extraction might make more sense than investing in treatment that may not last. Finally, ask when you should schedule your crown appointment so you can book it in advance and not delay it.
Chew on the opposite side of your mouth after the procedure until your permanent crown is in place. Biting on the treated tooth before it’s fully restored is one of the most common ways patients damage the work that was just done.