melphalan (Oral route)
Severe bone marrow suppression with resulting infection or bleeding may occur. Melphalan is leukemogenic in humans. Melphalan produces chromosomal aberrations in vitro and in vivo and, therefore, should be considered potentially mutagenic in humans .
Commonly used brand name(s)
In the U.S.
Available Dosage Forms:
Therapeutic Class: Antineoplastic Agent
Pharmacologic Class: Alkylating Agent
Chemical Class: Nitrogen Mustard
Uses For melphalan
Melphalan belongs to the group of medicines called alkylating agents. It is used to treat cancer of the ovaries and a certain type of cancer in the bone marrow.
Melphalan interferes with the growth of cancer cells, which are eventually destroyed. Since the growth of normal body cells may also be affected by melphalan, other effects will also occur. Some of these may be serious and must be reported to your doctor. Other effects may not be serious but may cause concern. Some effects may not occur for months or years after the medicine is used.
Before you begin treatment with melphalan, you and your doctor should talk about the good melphalan will do as well as the risks of using it.
Melphalan is available only with your doctor's prescription.
Before Using melphalan
In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For melphalan, the following should be considered:
Tell your doctor if you have ever had any unusual or allergic reaction to melphalan or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.
Although there is no specific information comparing use of melphalan in children with use in other age groups, melphalan is not expected to cause different side effects or problems in children than it does in adults.
Many medicines have not been studied specifically in older people. Therefore, it may not be known whether they work exactly the same way they do in younger adults or if they cause different side effects or problems in older people. There is no specific information comparing the use of melphalan in the elderly with use in other age groups.
There are no adequate studies in women for determining infant risk when using this medication during breastfeeding. Weigh the potential benefits against the potential risks before taking this medication while breastfeeding.
Interactions with Medicines
Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are taking melphalan, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.
Using melphalan with any of the following medicines is not recommended. Your doctor may decide not to treat you with this medication or change some of the other medicines you take.
- Measles Virus Vaccine, Live
- Mumps Virus Vaccine, Live
- Rotavirus Vaccine, Live
- Rubella Virus Vaccine, Live
- Varicella Virus Vaccine
Using melphalan with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.
- Adenovirus Vaccine
- Bacillus of Calmette and Guerin Vaccine, Live
- Cholera Vaccine, Live
- Influenza Virus Vaccine, Live
- Poliovirus Vaccine, Live
- Smallpox Vaccine
- Typhoid Vaccine
- Yellow Fever Vaccine
Using melphalan with any of the following medicines may cause an increased risk of certain side effects, but using both drugs may be the best treatment for you. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.
- Buthionine Sulfoximine
Interactions with Food/Tobacco/Alcohol
Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. Discuss with your healthcare professional the use of your medicine with food, alcohol, or tobacco.
Other Medical Problems
The presence of other medical problems may affect the use of melphalan. Make sure you tell your doctor if you have any other medical problems, especially:
- Bone marrow suppression or
- Leukopenia (low white blood cells in the blood) or
- Thrombocytopenia (low platelets in the blood)—May make these conditions worse.
- Chickenpox, including recent exposure or
- Herpes zoster (shingles)—May increase the risk of severe disease in other parts of the body.
- Gout, history of or
- Kidney stones, history of—May increase uric acid levels, which can cause gout or kidney stones.
- Infection—May decrease your body's ability to fight an infection.
- Kidney disease—Use with caution. The effects of melphalan may be increased because of slower removal from the body.
Proper Use of melphalan
Take melphalan only as directed by your doctor. Do not take more or less of it, do not take it more often, and do not take it for a longer time than your doctor ordered. The exact amount of medicine you need has been carefully worked out. Taking too much may increase the chance of side effects, while taking too little may not improve your condition.
Melphalan is sometimes given together with certain other medicines. If you are using a combination of medicines, it is important that you receive each one at the proper time. If you are taking some of these medicines by mouth, ask your health care professional to help you plan a way to remember to take your medicine at the right times.
While you are using melphalan, your doctor may want you to drink extra fluids so that you will pass more urine. This will help prevent kidney problems and keep your kidneys working well.
melphalan may cause nausea, vomiting, and loss of appetite. However, it is very important that you continue to receive the medicine, even if you begin to feel ill. Ask your health care professional for ways to lessen these effects.
If you vomit shortly after taking a dose of melphalan, check with your doctor. You will be told whether to take the dose again or to wait until the next scheduled dose.
The dose of melphalan will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of melphalan. If your dose is different, do not change it unless your doctor tells you to do so.
The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.
If you miss a dose of melphalan, skip the missed dose and go back to your regular dosing schedule. Do not double doses.
Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.
Keep out of the reach of children.
Do not keep outdated medicine or medicine no longer needed.
Ask your healthcare professional how you should dispose of any medicine you do not use.
Precautions While Using melphalan
It is very important that your doctor check your progress at regular visits to make sure that melphalan is working properly and to check for unwanted effects.
While you are being treated with melphalan, and after you stop treatment with it, do not have any immunizations (vaccinations) without your doctor's approval. Melphalan may lower your body's resistance and there is a chance you might get the infection the immunization is meant to prevent. In addition, other persons living in your household should not take or should not have taken oral polio vaccine within the last several months since there is a chance they could pass the polio virus on to you. Also, avoid other persons who have taken oral polio vaccine. Do not get close to them and do not stay in the same room with them for very long. If you cannot take these precautions, you should consider wearing a protective face mask that covers the nose and mouth.
Melphalan can lower the number of white blood cells in your blood temporarily, increasing the chance of getting an infection. It can also lower the number of platelets, which are necessary for proper blood clotting. If this occurs, there are certain precautions you can take, especially when your blood count is low, to reduce the risk of infection or bleeding:
- If you can, avoid people with infections. Check with your doctor immediately if you think you are getting an infection or if you get a fever or chills, cough or hoarseness, lower back or side pain, or painful or difficult urination.
- Check with your doctor immediately if you notice any unusual bleeding or bruising; black, tarry stools; blood in urine or stools; or pinpoint red spots on your skin.
- Be careful when using a regular toothbrush, dental floss, or toothpick. Your medical doctor, dentist, or nurse may recommend other ways to clean your teeth and gums. Check with your medical doctor before having any dental work done.
- Do not touch your eyes or the inside of your nose unless you have just washed your hands and have not touched anything else in the meantime.
- Be careful not to cut yourself when you are using sharp objects such as a safety razor or fingernail or toenail cutters.
- Avoid contact sports or other situations where bruising or injury could occur.
melphalan Side Effects
Along with their needed effects, medicines like melphalan can sometimes cause unwanted effects such as blood problems and other side effects. These and others are described below. Also, because of the way these medicines act on the body, there is a chance that they might cause other unwanted effects that may not occur until months or years after the medicine is used. These delayed effects may include certain types of cancer, such as leukemia. Discuss these possible effects with your doctor.
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:Less common
- Black, tarry stools
- blood in urine or stools
- cough or hoarseness, accompanied by fever or chills
- fast or irregular heart beat
- fever or chills
- lower back or side pain, accompanied by fever or chills
- painful or difficult urination, accompanied by fever or chills
- pinpoint red spots on skin
- shortness of breath
- skin rash or itching (sudden)
- troubled breathing
- unusual bleeding or bruising
- difficulty swallowing
- joint pain
- redness and/or soreness in arm or leg
- sores in the mouth and on the lips
- swelling of the feet or lower legs
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:Less common
- Nausea and vomiting
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.
See also: Side effects (in more detail)
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