Are there any contraindications or important safety considerations prescribers should be aware of?

Yes. REZENOPY is contraindicated in patients with known hypersensitivity to naloxone hydrochloride or any of its ingredients.¹ Key considerations include:

Opioid-dependent patients: Administration may precipitate opioid withdrawal, which can be life-threatening in neonates if not recognized and treated promptly.
Partial/mixed agonists: Reversal of respiratory depression caused by buprenorphine or pentazocine may be incomplete — larger or repeat doses may be required.
Post-surgical use: Abrupt reversal of opioid depression may result in adverse cardiovascular effects, particularly in patients with pre-existing cardiovascular disorders.
Continued surveillance: Due to naloxone’s duration of action relative to the opioid, patients should be monitored and additional doses administered as needed while awaiting emergency medical assistance.

For complete prescribing information, including full safety information, please see the Full Prescribing Information.

Denise Hearden2026-03-13T12:13:07-04:00March 13, 2026|For Healthcare Professionals|

Important Safety Information for REZENOPY™

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REZENOPY™ (naloxone hydrochloride) Nasal Spray 10 mg is an opioid antagonist indicated for the emergency treatment of known or suspected opioid overdose, as manifested by respiratory and/or central nervous system depression in adult and pediatric patients. It is intended for immediate administration as emergency therapy in settings where opioids may be present and is not a substitute for emergency medical care.

Important Safety Information for REZENOPY™

Important Safety Information

Contraindications: REZENOPY™ nasal spray is contraindicated in patients known to be hypersensitive to naloxone hydrochloride or to any of the other ingredients.

Warnings and Precautions:

- Risk of Recurrent Respiratory and CNS Depression: Due to the duration of action of naloxone relative to the opioid, keep the patient under continued surveillance and administer additional doses as necessary while awaiting emergency medical assistance.

- Risk of Limited Efficacy with Partial Agonists or Mixed Agonists/Antagonists: Reversal of respiratory depression caused by partial agonists or mixed agonists/antagonists, such as buprenorphine and pentazocine, may be incomplete. Larger or repeat doses may be required.

- Precipitation of Severe Opioid Withdrawal: Use in patients who are opioid-dependent may precipitate opioid withdrawal. In neonates, opioid withdrawal may be life-threatening if not recognized and properly treated. Monitor for the development of opioid withdrawal.

- Risk of Cardiovascular Effects: Abrupt postoperative reversal of opioid depression may result in adverse cardiovascular effects. These events have primarily occurred in patients who had pre-existing cardiovascular disorders or received other drugs that may have similar adverse cardiovascular effects. Monitor these patients closely in an appropriate healthcare setting after use of naloxone hydrochloride.

- Adverse Reactions: The following adverse reactions were observed in a REZENOPY™ nasal spray clinical study: upper abdominal pain, nasopharyngitis, and dysgeusia.

For complete product information, including Patient Information, please refer to the full Prescribing Information.

Content on this website is intended only for United States residents. Product labeling, packaging, and images are representative only. Images of healthcare providers, patients and caregivers on this site are not actual providers and patients. REZENOPY™ is a trademark of Scienture, LLC. Manufactured in the U.S.A.

Are there any contraindications or important safety considerations prescribers should be aware of?

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Important Safety Information for REZENOPY™

Important Safety Information for REZENOPY™

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