Pralidoxime is used as an antidote to treat poisoning caused by chemicals, pesticides (insect sprays), or drugs used to treat a muscle disorder.

This medication is not effective as an antidote for all types of pesticide poisonings.

Pralidoxime may also be used for purposes not listed in this medication guide.

If you receive pralidoxime during an emergency, make sure any follow-up doctor knows you received pralidoxime.

Pralidoxime is injected into a muscle, under the skin, or into a vein.

Your breathing, blood pressure, oxygen levels, kidney function, and other vital signs will be watched closely.

You may be watched for up to 72 hours to make sure the medicine has been effective and you no longer have any effects of the poison.

If possible during an emergency, tell your caregivers if you've ever had:

• an allergy to any medication;

• liver or kidney disease;

• heart problems; or

• high blood pressure.

If possible during an emergency, tell your caregivers if you are pregnant or breastfeeding.

In a medical setting you are not likely to miss a dose.

In a medical setting an overdose would be treated quickly.

Follow your doctor's instructions about any restrictions on food, beverages, or activity.

Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Some of the side effects of pralidoxime may be similar to the symptoms of poisoning. Your caregivers will watch you closely to determine whether your body is responding well to the medication, or if you are having any serious side effects.

Tell your caregivers right away if you have:

• fast or pounding heartbeats;

• chest tightness, shortness of breath;

• anxiety, dizziness, or nervousness;

• numbness or tingling;

• painful or difficult urination;

• little or no urination;

• vision problems; or

• muscular weakness.

Side effects may be more likely in older adults.

Common side effects of pralidoxime may include:

• pain for up to an hour after injection into a muscle;

• trouble breathing;

• vision changes;

• nausea;

• fast heartbeats, increased blood pressure;

• headache, dizziness, drowsiness; or

• muscle weakness.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Tell your doctor about all your other medicines, especially:

• atropine;

• morphine;

• a barbiturate such as phenobarbital;

• medicine to treat anxiety, mood disorders, or mental illness such as schizophrenia; or

• a bronchodilator--aminophylline, theophylline.

This list is not complete. Other drugs may affect pralidoxime, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are listed here.