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What are the possible side effects of pyrimethamine (Daraprim)?

Stop taking pyrimethamine and seek emergency medical attention if you experience an allergic reaction (swelling of the lips, tongue, or face; difficulty breathing; closing of the throat; or hives) during treatment with pyrimethamine.

Stop taking pyrimethamine and seek medical attention at the first sign of a skin rash, sore throat, paleness of the skin, unusual bruising under the skin, or swelling of the tongue. These may be early symptoms of serious side effects of pyrimethamine.

Other, less serious side effects may be more likely...

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What are the precautions when taking pyrimethamine (Daraprim)?

Before taking pyrimethamine, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: seizures, kidney problems, liver problems, a certain type of low red blood cell count (megaloblastic anemia due to low blood folate), low folic acid levels from other conditions (such as malnutrition, problems with absorption of food, alcoholism), low red/white blood cell counts, low blood-clotting cell (platelet) count.

Before having surgery, tell your doctor or dentist about all the products you use (including...

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