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Naloxone HCl injection

Important Note

The following information is intended to supplement, not substitute for, the expertise and judgment of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. Consult your healthcare professional before using this drug.





This medication is used to prevent or reverse the effects of narcotic pain relievers. It has also been used in the treatment of shock, alcoholic coma, schizophrenia and Alzheimer's disease.

How To Use

This medication is administered by injection into a vein or muscle. The dose may be repeated as needed or this may be continuously infused depending on your condition and the purpose it is being used. This medication must be used under close medical supervision so the dose can be adjusted to the response.

Side Effects

Nausea, stomach upset or drowsiness may occur. If these effects continue or become bothersome, inform your doctor. Notify your doctor if you develop: vomiting, sweating, tremors, breathing trouble, seizures, rapid/pounding/irregular heartbeat. If you notice other effects not listed above, contact your doctor or pharmacist.


Tell your doctor if you have: heart problems, heart disease, been using any type of pain reliever for more than 2 weeks, allergies (especially drug allergies). This medication should be used only if clearly needed during pregnancy or while breast-feeding. Discuss the risks and benefits with your doctor.

Drug Interactions

Tell your doctor of any over-the-counter or prescription medication you may take, including: narcotic pain medications. Do not start or stop any medicine without doctor or pharmacist approval.


If overdose is suspected, contact your local poison control center or emergency room immediately.


This medication can cause withdrawal symptoms in persons addicted to narcotic pain relievers.

Missed Dose

It is important that each dose be taken as needed. If you miss a dose, take it as soon as remembered. Skip the missed dose. Do not "double-up" the dose to catch up.


Store at room temperature between 59 and 86 degrees F (15 to 30 degrees C) as directed for up to 24 hours. Check the expiration date on the label and properly discard of any unused medication after that time.