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Polymyxin B/trimethoprim (Into the eye)

Polymyxin B (pol-ee-MIX-in B), Trimethoprim (trye-METH-oh-prim)

Treats eye infections.

Brand Name(s):

Polytrim

There 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 polymyxin B or trimethoprim.

How to Use This Medicine:

Liquid, Drop

  • Your doctor will tell you how much medicine to use. Do not use more than directed.
  • Take all of the medicine in your prescription to clear up your infection, even if you feel better after the first few doses.
  • Wash your hands with soap and water before and after using this medicine.
  • Shake the eye drops well just before each use.
  • Lie down or tilt your head back. With your index finger, pull down the lower lid of your eye to form a pocket.
  • If you wear contact lenses, remove them before using this medicine. You may insert them again after 15 minutes.
  • 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.

Warnings While Using This Medicine:

  • Tell your doctor if you are pregnant or breastfeeding.
  • If you hurt your eye, develop an eye infection, or need to have eye surgery, talk with your doctor right away. You may need to change your medicine or stop using it.
  • Call your doctor if your symptoms do not improve or if they get worse.
  • Your doctor will check your progress and the effects of this medicine at regular visits. 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
  • Increased redness, burning, or pain in your eye
  • Swelling of your eyelid

If you notice these less serious side effects, talk with your doctor:

  • Mild irritation in your eye when you use the drops

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: 6/4/2018
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