Let's learn about the drug Fluorouracil (5-FU), which will help you in the fight against cancer!

It's normal to feel a heavy burden when you hear that you or someone close to you has cancer. At the same time, when doctors talk about the treatment for this, especially when they hear words like "chemotherapy", it can be a little more daunting. But when you are properly informed about these things, you will get a lot of strength to go on this journey. Today we are going to talk about a commonly used drug that helps fight cancer cells. That is Fluorouracil , some also call it 5-FU .

What kind of medicine is Fluorouracil (5-FU)?

Simply put, fluorouracil is a drug that controls the growth of cancer cells, that is, it slows them down . Just like weed control, it helps stop cancer cells from spreading. It is a type of chemotherapy. Doctors use this drug to treat many different types of cancer. Here are a few examples:

• Breast cancer
• Colon or rectal cancer
• Pancreatic cancer
• Stomach cancer

This medicine may sometimes be available under other names, for example `Adrucil`. Also, your doctor may use this medicine for other purposes depending on your condition. So if you have any questions, it is best to ask your doctor or pharmacist.

What are the things you need to tell your doctor before starting this medication?

This is a very important point. Before you start taking this medicine, it is essential to give your doctor a complete description of your health condition. Even the smallest thing should be told without hiding it. Because, based on that information, things like whether this medicine is suitable for you and how much to give are decided. If you have any of the following, be sure to tell your doctor:

• If there is any disease or problem in the blood (Blood disorders).
• Dihydropyrimidine Dehydrogenase (DPD) deficiency is a genetic condition. People who are deficient in this enzyme may have difficulty tolerating the drug fluorouracil , which can cause serious side effects . That's why it's important to talk about it.
• Any current infection , especially viral infections such as chickenpox and herpes`(Virus infection such as chickenpox, cold sores, or herpes)`.
• Kidney disease .
• Liver disease .
• If you are malnourished , that is, if you are not getting enough food and drink, and your nutritional status is low.
• If you have recently received radiation therapy or are currently receiving it .
• If you have an unusual or allergic reaction to fluorouracil , other chemotherapy drugs, any other medicine, food, dyes, or preservatives .
• If you are pregnant or trying to get pregnant , this is very important.
• If you are a breastfeeding mother .

Not only these things, but also tell your doctor about any health problems you have.

How can I give you this medicine?

Fluorouracil (5-FU) is usually given to you as an injection into a vein or as an infusion into a vein, similar to saline . This is not something you can do at home. This treatment is given in a hospital or clinic by a health care professional who has been specially trained to do this. Special care must be taken when giving this medicine to young children. If your child is going to be given this medicine, talk to your pediatrician about it.

What if I take too much medicine? Or if I miss a dose?

If you think you have taken too much of this medicine, call a poison control center or emergency room immediately . It is very important to take your medicine exactly as your doctor has prescribed. If for any reason you are unable to come in for your treatment on the scheduled day, call your doctor or health care provider immediately and let them know .

What other interactions may occur with this medicine?

There are some medications that can cause problems when taken with fluorouracil . Therefore, you should tell your doctor about all the medications you are taking, including vitamins, herbal remedies, and dietary supplements. In particular, you should not take fluorouracil with the following medications :

• Live virus vaccines : Because your immune system may be weakened when you take this medicine, getting vaccines that contain live viruses can cause infections.

Also, there are some other medications that can interact with fluorouracil . For example:

• Medicines that prevent or treat blood clotting (e.g. warfarin, enoxaparin, dalteparin).

This list is not complete. So, tell your doctor about all the medications you take, the cigarettes you smoke, the alcohol you drink, and the illegal drugs you use . Some things can interact with your medications.

What things should you be careful about when taking medication?

You need to take great care of your body while taking fluorouracil treatment.

• See your doctor regularly and check your condition .
• This medicine may make you feel more uncomfortable and sore than usual . This is normal. This is because chemotherapy drugs can affect not only cancer cells, but also healthy cells. However, continue with the treatment prescribed for you until your doctor tells you to stop .
• If you experience any side effects, tell your doctor . Sometimes other medications may be prescribed to control the side effects. Follow the instructions for using the medication exactly as directed.
• If you have a fever, chills, sore throat, or other symptoms of a cold , tell your doctor or health care provider right away . Do not take any medication that you feel like taking. This medication can lower your body's ability to fight off illness. Therefore, try to stay away from people who are sick as much as possible.
• This medicine may increase your risk of bleeding or bruising . Tell your doctor if you notice any unusual bleeding (e.g. nosebleeds, bleeding gums, blood in your stool).
• Be very careful when brushing, flossing, and using a toothpick . This can easily cause your gums to become injured, infected, or bleed. If you are going to have any dental treatment, tell your dentist that you are taking this medicine.
• Do not take painkillers such as aspirin, paracetamol, ibuprofen, naproxen, and ketoprofen without your doctor's advice. These medications can suppress symptoms such as fever.
• Do not become pregnant while taking this medicine . If a pregnant woman receives this medicine, it may cause serious harm to the unborn baby. If you are trying to become pregnant or think you may be pregnant, tell your doctor right away. Ask your doctor or pharmacist for more information. Do not breast-feed while taking this medicine .
• Men should also be aware of this . If you are trying to have a child, tell your doctor about it, as this medication can reduce sperm count.
• You have diarrhea (stomach ache).If you have diarrhea, don't take it at the pharmacy on your own. If the diarrhea lasts more than two days, is very severe, or is watery, tell your doctor.
• This medicine may make your skin very sensitive to sunlight . Therefore, limit your exposure to the sun as much as possible. If you go outside, wear clothing that covers your body well, wear sunglasses, and use sunscreen. Do not use sun lamps or tanning beds/booths.

What side effects should I tell the doctor about as soon as possible?

Like all medications, fluorouracil can cause side effects. Some are not serious, but you should tell your doctor if you experience any of these side effects . These include:

• Allergic reactions : skin rash, itching, hives, swelling of the face, lips, or tongue.
• Decreased blood counts : This medicine can cause a decrease in the number of white blood cells (cells that fight disease), red blood cells (cells that carry oxygen), and platelets (cells that help blood clot). This can increase your risk of infection and bleeding .
• Symptoms of infection : fever or chills, cough, sore throat, pain or difficulty urinating.
• Symptoms of low platelets or bleeding : bruising in places on the body, small red dots on the skin (like being pricked by a pin), black, tarry stools, blood in the urine.
• Symptoms of low red blood cells : feeling unusually tired, feeling faint when standing, feeling dizzy.
• Difficulty breathing .
• Vision changes (e.g. blurred vision).
• Chest pain .
• Mouth sores (inside the mouth, on the lips).
• Nausea and vomiting (frequent or severe).
• Pain, swelling, and redness at the injection site .
• Pain, numbness, or a feeling of tightness in the hands or feet .
• Redness, swelling, or soreness of the palms or soles (also called `Hand-Foot Syndrome`).
• Stomach pain (severe).
• Abnormal bleeding .

If you experience any of these symptoms, do not waste time and immediately inform your doctor or the hospital where you are being treated .

What are the side effects that are usually not serious enough to tell the doctor , but should be reported if they persist or are bothersome?

There are some side effects, they are not that serious, but if they persist or if they bother you, it is best to tell your doctor.

• Changes in finger or toenails (e.g., discoloration, easy breakage).
• Diarrhea (not severe, subsides in a few days).
• Dry or itchy skin .
• Hair loss . This happens to many people, but the hair grows back after treatment is over.
• Headache .
• Food is tasteless .
• Eyes sensitive to sunlight .
• A slight stomach upset, like indigestion .
• Unusual tears coming from the eyes .

This list does not include all possible side effects. If you notice anything else unusual, talk to your doctor about it.

Where do you keep this medicine?

This is not a medicine you can keep at home. Fluorouracil (5-FU) is given in a hospital or clinic, so you don't have to worry about storing it.

Finally, remember (Take-Home Message)

This article is just a summary of the anticancer drug fluorouracil (5-FU). We hope this will give you some idea about this drug. However, it is not a substitute for talking to your doctor, pharmacist, or other healthcare provider .

If you have any questions about this medication, how it works, side effects, or anything else, don't hesitate to ask your medical team . They are here to help you.

Cancer treatment can be a challenging journey. But with the right knowledge, guidance from your doctor, and support from your family, you can face this challenge. Remember, you are not alone .

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