What side effects may I notice from receiving Pyrimethamine?

Side effects that you should report to your doctor or health care professional as soon as possible:
-allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
-dark urine
-difficulty breathing
-feeling faint or lightheaded
-fever or chills, sore throat
-increased sensitivity to the sun or ultraviolet light
-irregular heartbeat
-seizures
-sore mouth
-redness, blistering, peeling, or loosening of skin, including skin inside the mouth
-unusual bleeding or bruising
-unusually weak or tired

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):
-diarrhea
-loss of appetite
-nausea, vomiting
-stomach upset

This list may not describe all possible side effects for Pyrimethamine. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.