Neosar (oral and injection)
Medically reviewed on September 22, 2017
The Neosar brand name has been discontinued in the U.S. If generic versions of this product have been approved by the FDA, there may be generic equivalents available.
What is Neosar?
Neosar is a cancer medication that interferes with the growth and spread of cancer cells in the body.
Neosar is used to treat several types of cancer. This medicine is also used to treat certain cases of nephrotic syndrome (kidney disease) in children.
Neosar may also be used for purposes not listed in this medication guide.
You should not use Neosar if you have severe bone marrow suppression.
Before taking this medicine
You should not use Neosar if you are allergic to it, or if you have severe bone marrow suppression.
To make sure Neosar is safe for you, tell your doctor if you have:
an active or recent infection;
a weak immune system (caused by disease or by using certain medicines);
if you are receiving other cancer treatments; or
if you have ever received radiation treatment.
Using Neosar may increase your risk of developing other types of cancer, such as bladder cancer. Talk with your doctor about your specific risk.
Do not use Neosar if you are pregnant. It could harm the unborn baby. Use effective birth control, and tell your doctor if you become pregnant during treatment.
This medication may affect fertility (your ability to have children), whether you are a man or a woman.
Cyclophosphamide can pass into breast milk and may harm a nursing baby. You should not breast-feed while you are using this medication.
How is Neosar given?
Follow the directions on your prescription label. Do not use Neosar in larger or smaller amounts or for longer than recommended.
Neosar is sometimes given as a pill or liquid. This medicine may also be given as an injection into a vein through an IV. You will receive the injection in a clinic or hospital setting.
Drink plenty of liquids while you are using Neosar, to prevent harmful effects on your bladder.
Measure liquid medicine with the dosing syringe provided, or with a special dose-measuring spoon or medicine cup. If you do not have a dose-measuring device, ask your pharmacist for one.
Neosar can lower blood cells that help your body fight infections and help your blood to clot. This can make it easier for you to bleed from an injury or get sick from being around others who are ill. Your blood may need to be tested often.
If you need surgery, tell the surgeon ahead of time that you are using Neosar. You may need to stop using the medicine for a short time.
Ask your doctor or pharmacist how to safely handle this medicine. Neosar can be harmful if it gets on your skin. If this occurs, wash thoroughly with soap and water.
Store Neosar tablets at room temperature away from moisture and heat.
Store the liquid medicine in the refrigerator, do not freeze. Throw away any unused liquid after 14 days.
What happens if I miss a dose?
Take the missed oral dose as soon as you remember. If it is almost time for the next dose, skip the dose you missed and take only the next regularly scheduled dose as directed. Do not take a double dose of this medication.
Contact your doctor if you miss a dose of Neosar.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
What should I avoid while taking Neosar?
Neosar can pass into body fluids (urine, feces, vomit). Caregivers should wear rubber gloves while cleaning up a patient's body fluids, handling contaminated trash or laundry or changing diapers. Wash hands before and after removing gloves. Wash soiled clothing and linens separately from other laundry.
Avoid being near people who are sick or have infections. Tell your doctor at once if you develop signs of infection.
Do not receive a "live" vaccine while using Neosar, and for at least 3 months after your treatment ends. Also avoid coming into contact with anyone who has recently received a live vaccine. There is a chance that the virus could be passed on to you. Live vaccines include measles, mumps, rubella (MMR), rotavirus, typhoid, yellow fever, varicella (chickenpox), zoster (shingles), and nasal flu (influenza) vaccine.
Neosar side effects
Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have:
blood in your urine or stools, pain or burning when you urinate;
pale skin, feeling light-headed, rapid heart rate, trouble concentrating;
sudden chest pain or discomfort, wheezing, dry cough or hack, feeling short of breath on exertion;
fever, chills, body aches, flu symptoms, sores in your mouth and throat;
easy bruising, unusual bleeding (nose, mouth, vagina, or rectum), purple or red pinpoint spots under your skin;
jaundice (yellowing of the skin or eyes); or
severe skin reaction -- fever, sore throat, swelling in your face or tongue, burning in your eyes, skin pain, followed by a red or purple skin rash that spreads (especially in the face or upper body) and causes blistering and peeling.
Common side effects may include:
temporary hair loss;
a wound that will not heal;
missed menstrual periods;
changes in skin color; or
changes in nails.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
See also: Side effects (in more detail)
What other drugs will affect Neosar?
Tell your doctor about all medications you use, and those you start or stop using during your treatment with Neosar, especially:
phenobarbital (Solfoton); or
This list is not complete. Other drugs may interact with cyclophosphamide, including prescription, over-the-counter, vitamin, and herbal products. Not all possible interactions are listed in this medication guide.
Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Copyright 1996-2018 Cerner Multum, Inc. Version: 6.05.
More about Neosar (cyclophosphamide)
- Neosar Side Effects
- During Pregnancy or Breastfeeding
- Dosage Information
- Drug Interactions
- Support Group
- En Español
- 0 Reviews
- Drug class: alkylating agents