Highlights for trimethoprim
trimethoprim Side Effects
Side effects that you should report to your doctor or health care professional as soon as possible:\n-allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue\n-breathing problems\n-chest pain\n-fast, irregular heartbeat\n-fever, chills, or sore throat\n-bluish fingernails or lips\n-redness, blistering, peeling or loosening of the skin, including inside the mouth\n-unusual bleeding or bruising\n-unusually weak or tired\n\nSide effects that usually do not require medical attention (report to your doctor if they continue or are bothersome):\n-aches or pains\n-changes in taste\n-diarrhea\n-headache\n-nausea, vomiting\n-stomach pain
trimethoprim May Interact with Other Medications
Do not take this medicine with any of the following medications:\n-dofetilide\n\nThis medicine may also interact with the following medications:\n-ACE inhibitors like benazepril, enalapril, lisinopril, moexipril, quinapril, ramipril, and others\n-dapsone\n-digoxin\n-fluorouracil\n-MAOIs like Carbex, Eldepryl, Marplan, Nardil, and Parnate\n-medicines that treat or prevent blood clots like warfarin\n-phenytoin\n-procainamide\n-pyrimethamine\n-some diuretics\n-trimetrexate
How to Use trimethoprim
Take this medicine by mouth. Follow the directions on the prescription label. Use a specially marked spoon or container to measure each dose. Ask your pharmacist if you do not have one. Household spoons are not accurate. Take your medicine at regular intervals. Do not take your medicine more often than directed. Do not skip doses or stop your medicine early even if you feel better. Do not stop taking except on your doctor's advice.\n\nTalk to your pediatrician regarding the use of this medicine in children. While this drug may be prescribed for children as young as 6 months old for selected conditions, precautions do apply.
They need to know if you have any of these conditions:\n-anemia\n-kidney disease\n-liver disease\n-poor nutrition\n-an unusual or allergic reaction to trimethoprim, other medicines, foods, dyes, or preservatives\n-pregnant or trying to get pregnant\n-breast-feeding
If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.
Visit your doctor or health care professional as directed. Tell your doctor or healthcare professional if your symptoms do not start to get better or if they get worse.\n\nThis medicine can make you more sensitive to the sun. Keep out of the sun. If you cannot avoid being in the sun, wear protective clothing and use a sunscreen. Do not use sun lamps or tanning beds/booths.
Keep out of the reach of children.\n\nStore at room temperature between 15 and 25 degrees C (59 and 77 degrees F). Protect from light and moisture. Keep container tightly closed. Throw away any unused medicine after the expiration date.
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Last Updated: September 2, 2009