Flucytosine (By mouth)
Treats serious fungus infections.
AncobonThere may be other brand names for this medicine.
When This Medicine Should Not Be Used:This medicine is not right for everyone. Do not use it if you had an allergic reaction to flucytosine, or if you have dihydropyrimidine dehydrogenase (DPD) enzyme deficiency (rare hereditary problem).
How to Use This Medicine:
- Your doctor will tell you how much medicine to use. Do not use more than directed.
- Swallow one capsule at a time over a 15 minute period to help prevent nausea and vomiting.
- Take all of the medicine in your prescription to clear up your infection, even if you feel better after the first few doses.
- Missed dose: Take a dose as soon as you remember. If it is almost time for your next dose, wait until then and take a regular dose. Do not take extra medicine to make up for a missed dose.
- Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light.
Drugs and Foods to Avoid:
Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.
- Some medicines can affect how flucytosine works. Tell your doctor if you are using cytarabine.
Warnings While Using This Medicine:
- Tell your doctor if you are pregnant or breastfeeding, or if you have kidney disease, liver disease, blood or bone marrow problems, or a weak immune system.
- Your doctor will do lab tests at regular visits to check on the effects of this medicine. Keep all appointments.
- Keep all medicine out of the reach of children. Never share your medicine with anyone.
Possible Side Effects While Using This Medicine:
Call your doctor right away if you notice any of these side effects:
- Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing
- Dark urine or pale stools, nausea, vomiting, loss of appetite, stomach pain, yellow skin or eyes
- Dry mouth, increased thirst, muscle cramps
- Fever, chills, cough, sore throat, body aches
- Numbness, tingling, or burning pain in your hands, arms, legs, or feet
- Rapid weight gain, swelling in your hands, ankles, or feet
- Shaking, trembling, sweating, faintness or lightheadedness, hunger, confusion
- Tiredness, trouble breathing, uneven heartbeat
- Unusual bleeding, bruising, or weakness
If you notice these less serious side effects, talk with your doctor:
- Hearing loss, headache
- Skin rash
If you notice other side effects that you think are caused by this medicine, tell your doctor
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088
Last Updated: 6/2/2022