Find the latest news about KLOXXADO® (naloxone HCl) Nasal Spray 8 mg, as well as helpful information about opioid overdose safety, opioid addiction treatment and recovery. Check back often to see our latest blog posts.
Contraindications
Hypersensitivity to naloxone hydrochloride or to any of the other ingredients
Warnings and Precautions
Side Effects
The following serious side effect is discussed in the full Prescribing Information for KLOXXADO®:
Symptoms of sudden and severe opioid withdrawal resulting from the use of KLOXXADO® in someone regularly using opioids include: body aches, diarrhea, increased heart rate, fever, runny nose, sneezing, goosebumps, sweating, yawning, nausea or vomiting, nervousness, restlessness or irritability, shivering or trembling, stomach cramps, weakness and increased blood pressure.
Infants may have seizures, cry more than normal and have increased reflexes.
Some people may become aggressive after abrupt reversal of opioid overdose.
In two clinical studies, a total of 47 healthy adult volunteers were exposed to a single dose of KLOXXADO®, one spray in one nostril. Side effects were reported in two subjects for each of the following: abdominal pain, asthenia, dizziness, headache, nasal discomfort, and presyncope.
These are not all of the possible side effects of KLOXXADO®. Contact your doctor for medical advice about side effects.
Pregnancy, Infancy and Breastfeeding, Children
Tell your doctor if you are pregnant or plan to become pregnant. If you are pregnant and opioid dependent, use of KLOXXADO® may cause withdrawal symptoms in you and your unborn baby. A healthcare provider should monitor you and your unborn baby right away after you use KLOXXADO®.
There is no information regarding the presence of naloxone in human milk, the effects of naloxone on the breastfed infant or on milk production.
If the primary concern is an infant at risk of an overdose, consider whether other naloxone-containing products may be more appropriate.
KLOXXADO® nasal spray is safe and effective in children for known or suspected opioid overdose.
Dosage and Administration
Do not attempt to prime or test-fire the device. Each KLOXXADO® Nasal Spray contains only 1 dose of medicine and cannot be reused. Read the “instructions for use” at the end of the Prescribing Information and Medication Guide for detailed information about the right way to use KLOXXADO® Nasal Spray.
Storage and Handling
Store KLOXXADO® at room temperature between 68°F to 77°F (20°C to 25°C). Do not expose to temperatures below 41°F (5°C) or above 104°F (40°C). Do not freeze KLOXXADO®. Keep KLOXXADO® in its box until ready to use. Protect from light. Replace KLOXXADO® before the expiration date on the box. Keep KLOXXADO® and all medicines out of the reach of children.
For more information, please see the full Prescribing Information and Medication Guide.
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit https://www.fda.gov/medwatch or call 1-800-FDA-1088.
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Customer Service: Phone 1-800-631-2174 | Email
© Hikma Pharmaceuticals USA Inc. All rights reserved.
KLOXXADO®️ is a registered trademark of Hikma Pharmaceuticals USA Inc.
Better Health. Within Reach. Every Day.®️ is a registered trademark of Hikma Pharmaceuticals PLC.
Emergent Devices Inc. is wholly owned subsidiary of Emergent BioSolutions Inc.
KLOXXADO® is manufactured by Hikma Pharmaceuticals USA Inc. Columbus, OH 43228, and distributed by Emergent Devices Inc. Plymouth Meeting, PA 19462.
PP-KLOX-US-00024
July 2025