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PYRIMETHAMINE (Oral) (Tablet) Drug and Prescription Information


PYRIMETHAMINE (Oral) (Tablet) Medication Classification


PYRIMETHAMINE (Oral) (Tablet) Brandname


PYRIMETHAMINE (Oral) (Tablet) is used for the Treatment

Pyrimethamine (peer-i-METH-a-meen) Helps prevent malaria and treats toxoplasmosis, an infection caused by a parasite. Is also used to prevent other kinds of infections.

When To Not Use PYRIMETHAMINE (Oral) (Tablet)

You should not use this medicine if you have had an allergic reaction to pyrimethamine or if you have a severe type of blood disease (megaloblastic anemia) caused by not having enough folic acid in your body.

How Should You Use PYRIMETHAMINE (Oral) (Tablet)


  • Your doctor will tell you how much medicine to take and how often. You should not use more of this medicine than your doctor ordered.
  • You may take this medicine with food if it upsets your stomach or causes vomiting.
  • This medicine should be taken on a regular schedule. Try not to miss any doses. Keep taking the medicine for as long as your doctor has ordered, even if you feel better.
  • If a dose is missed:
  • Take the missed dose as soon as possible, unless it is almost time for your next dose.
  • Skip the missed dose if it is almost time for your next regular dose.
  • You should not use two doses at the same time.

Proper PYRIMETHAMINE (Oral) (Tablet) Storage

Store PYRIMETHAMINE (Oral) (Tablet) at room temperature away from sunlight and moisture unless otherwise stated by manufacturer's instructions or labelling. Keep PYRIMETHAMINE (Oral) (Tablet) and all medications out of the reach of children.

What To Avoid While Using PYRIMETHAMINE (Oral) (Tablet)

Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.

  • Make sure your doctor knows if you are taking phenytoin (Dilantin®), lorazepam (Ativan®), or sulfa drugs such as Bactrim® or Septra®.

PYRIMETHAMINE (Oral) (Tablet) Warnings

  • If you are pregnant or breastfeeding, talk to your doctor before taking this medicine. You may need to stop breastfeeding while taking this medicine.
  • Talk to your doctor before taking this medicine if you have seizures, any blood disorders, kidney disease, liver disease, or a history of alcoholism.
  • If you develop a skin rash, stop taking this medicine and call your doctor right away.
  • This medicine may help prevent malaria, but is not used to treat a severe attack of malaria.
  • Pyrimethamine may cause harmful side effects. To help treat these side effects, you may also be given another medicine called leucovorin. It is important that you take leucovorin exactly as your doctor ordered. Do not skip any doses.

PYRIMETHAMINE (Oral) (Tablet) Side Effects

Call your doctor right away if you notice any of these side effects:

  • Skin rash, hives, or itching
  • Wheezing or trouble breathing
  • Swollen tongue
  • Unexplained fever, sore throat, or chills
  • Unusual bleeding, bruising, or purple spots on your skin
  • Yellowing of skin and eyes
  • Extreme tiredness
  • Pain when urinating or bloody urine
  • If you notice these less serious side effects, talk with your doctor:
  • Headache, dizziness
  • Nausea or upset stomach
  • Diarrhea

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