Getting ready for a breast MRI comes down to a few practical steps: avoid deodorant, lotion, and powder on the day of the scan, wear clothing you can remove easily, leave metal and jewelry at home, and bring your insurance card, photo ID, and any prior imaging records. If your doctor ordered contrast, you will also need recent blood test results for kidney function. Most people can eat and take their usual medications unless the imaging center tells them otherwise.
A breast MRI is a long, loud, enclosed scan, and knowing what to expect removes most of the anxiety around it. This checklist walks you through what to do the day before, the morning of, and what to bring, based on standard radiology practice.
Why Does a Breast MRI Require Special Preparation?
A breast MRI uses a powerful magnet and radio waves to build detailed images of breast tissue. Because the magnet is always on, any metal on or in your body can interfere with the scan or, in rare cases, pose a safety risk. That is the main reason preparation matters.
The scan also works best when nothing on your skin or clothing distorts the image. Deodorant, antiperspirant, body lotion, powder, and some cosmetics can contain metals like aluminum or zinc. These show up as bright spots or signal gaps on the images and can make a radiologist’s read less reliable. Some imaging centers will reschedule if you arrive with these products on.
If your exam includes a contrast agent (the dye injected into a vein), the preparation extends to your kidneys. The most common contrast agents used for MRI contain gadolinium, which the kidneys clear from the body. People with reduced kidney function may need a blood test first. The American College of Radiology publishes guidance on this, and most imaging centers follow a similar screening process.
What Should You Avoid the Day Before and the Day Of?
Skip deodorant, antiperspirant, lotion, body powder, and perfume on the morning of your scan. This is the single most common instruction people miss, and it is easy to fix.
Here is a practical list of what to leave off your skin:
- Deodorant and antiperspirant (both contain metal compounds)
- Body lotion, moisturizer, and sunscreen
- Talcum or baby powder
- Perfume, cologne, and scented body sprays
- Makeup if your center asks you to skip it (some do, especially around the face and chest)
If you shower the morning of your appointment, that is fine. Just do not reapply any of the products above afterward. If you have a morning appointment and normally wear deodorant, consider showering the night before instead so you are not tempted.
Nail polish is usually allowed, though some centers ask you to remove gel or acrylic nails if they contain metal. Ask when you schedule.
What Should You Wear to a Breast MRI?
Wear comfortable, loose clothing that is easy to take off and put back on. You will change into a hospital gown for the scan itself, so the goal is convenience, not fashion.
A two-piece outfit, such as a top and pants or a skirt, is easier than a dress or jumpsuit. Avoid clothing with metal zippers, snaps, underwire bras, or decorative hardware near the chest. Leave jewelry, watches, hairpins, and piercings at home. If you cannot remove a piercing, tell the technologist before the scan.
Wear flat, comfortable shoes. You will be lying still for a while, and you may be asked to walk to and from the changing area.
Can You Eat, Drink, and Take Medications Before a Breast MRI?
In most cases, yes. You can eat a normal meal and take your regular medications unless your imaging center gives you different instructions. Fasting is not typically required for a breast MRI.
There are exceptions. If your scan is scheduled with sedation because of claustrophobia or another reason, you will likely be asked not to eat or drink for several hours beforehand. Follow whatever the center tells you in that case.
If you take medications, bring a current list with you. Some centers ask about blood thinners, diabetes medications, and any drug that affects kidney function. Do not stop any prescription medication on your own without talking to your doctor first.
If you are breastfeeding, tell the imaging center when you schedule. Guidance on contrast agents and breastfeeding has shifted over the years, and the current direction from major radiology bodies is generally more permissive than it once was. Ask your center what they recommend so you can plan.
What Should You Bring to Your Appointment?
Bring your photo ID, insurance card, and the order from your referring doctor if you have a paper copy. Bring a list of your medications, including doses.
Also bring:
- Any prior breast imaging, such as mammogram or ultrasound reports, or a CD of prior images if the center requests it
- Records of any prior biopsies or surgeries
- Information about any implanted device, such as a pacemaker, cochlear implant, or joint replacement
- A credit card or payment method for any copay
Tell the scheduling staff in advance about any metal in your body. Most modern implants are MRI-safe, but the technologist needs to confirm this before you enter the scanner room. Some devices, like certain older pacemakers, require special precautions or may make an MRI unsafe.
How Should You Prepare for the Scan Itself?
A breast MRI usually takes about 30 to 60 minutes, and you will lie face down on a padded table with your breasts positioned in openings in the table. The table then slides into the scanner, which is a large tube open at both ends.
The machine is loud. You will be given earplugs or headphones, and some centers offer music. You will need to lie very still, because movement blurs the images. The technologist will talk to you through a speaker between sequences.
If you are prone to anxiety in enclosed spaces, tell your doctor or the imaging center ahead of time. Some centers offer a mild anti-anxiety medication with a prescription, or they can schedule extra time and talk you through the process. Do not assume you have to tough it out silently.
If your scan includes contrast, a nurse or technologist will place a small IV line in your arm or hand before the scan begins. The contrast is injected partway through, and you may feel a brief flush or a metallic taste. These sensations are common and usually pass quickly. Tell the technologist right away if you feel itching, swelling, or trouble breathing.
What Happens If You Forget Something?
Do not panic. If you arrive wearing deodorant or lotion, tell the front desk. Many centers keep wipes on hand so you can clean the skin before the scan. Arriving early gives you time to sort out small issues.
If you forget your ID or insurance card, call the center. Some can verify your information another way, but policies vary. If you forget prior imaging records, the scan can usually still go forward, though the radiologist may have less context for comparison.
The most important thing is honesty. Tell the technologist about any metal, implanted device, or pregnancy. Pregnancy is a specific consideration with MRI, and you should tell the scheduler and the technologist if you are or might be pregnant.
Frequently Asked Questions
Can I wear deodorant to a breast MRI?
No. Skip deodorant, antiperspirant, lotion, and powder on the day of your scan because they can contain metals that distort the images. If you forget, tell the front desk and they can often provide wipes.
Do I need to fast before a breast MRI?
Usually not. You can eat and drink normally and take your regular medications unless your imaging center tells you otherwise. Fasting is typically only required if your scan involves sedation.
How long does a breast MRI take?
Most breast MRI exams take about 30 to 60 minutes, depending on whether contrast is used and how many sequences are needed. Plan to arrive early for check-in and changing.
Can I drive myself home after a breast MRI?
Yes, in most cases. If you receive a sedative for anxiety, you will need someone else to drive you home, so arrange a ride in advance.
