On this page · 9 sections

Ionsys

Generic name: fentanyl transdermal (device)

Used for Pain
Last updated March 20, 2026 0 views Reviewed by Carmen Pope, Senior Medical Editor, B. Pharm
Share

What is Ionsys?

The Ionsys transdermal device contained fentanyl, an opioid pain medication. An opioid is sometimes called a narcotic.

Ionsys was a patient-controlled medicine system used only in a hospital to treat acute pain after surgery.

The Ionsys transdermal device was placed on the skin of your arm or chest.

Ionsys has been discontinued, and there is no generic alternative, but generic fentanyl transdermal patches are still available. This information is retained for educational purposes only and may not be up to date.

Warnings

Because of the risks of addiction, abuse, and misuse, overdose, and death with opioids, which can occur at any dosage or duration and persist over the course of therapy, reserve fentanyl for use in patients for whom alternative treatment options (such as non-opioid analgesics or immediate-release opioids) are ineffective, not tolerated, or would be otherwise inadequate to provide sufficient management of pain.

You should not use an Ionsys transdermal device if you have: a severe breathing problem, or a blockage in your stomach or intestines.

The Ionsys transdermal device is used only while you are in a hospital. You will not be allowed to use the device at home. Do not leave the hospital with this device on your skin.

Fentanyl can slow or stop your breathing. Use this device only as directed. Never allow a family member or visitor to touch or handle the Ionsys transdermal device. It should be handled only by a healthcare professional.

MISUSE OF IONSYS CAN CAUSE ADDICTION, OVERDOSE, OR DEATH, especially in a person using the medicine without a prescription. Fentanyl may also be habit-forming. Never share an Ionsys transdermal device with another person, especially someone with a history of drug abuse or addiction.

Fentanyl may cause life-threatening withdrawal symptoms in a newborn if the mother uses Ionsys se the mediduring pregnancy.

Do not drink alcohol. Dangerous side effects or death could occur.

The Ionsys transdermal device may burn your skin if you wear the patch during an MRI (magnetic resonance imaging). Remove the device before undergoing such a test.

Before taking this medicine

You should not use Ionsys if you are allergic to fentanyl or to Cepacol (cetylpyridinium chloride), or if you have:

  • a severe breathing problem such as asthma attacks; or
  • a blockage in your digestive tract (stomach or intestines).

Some medicines can cause unwanted or dangerous effects when used with Ionsys. You may not be able to use this medicine if you also use certain antibiotics, antifungal medications, heart or blood pressure medications, or medicines to treat hepatitis C or HIV/AIDS. Tell your doctor about all medicines you use.

Some medicines can interact with fentanyl and cause a serious condition called serotonin syndrome. Be sure your doctor knows if you also take medicine for depression, mental illness, Parkinson's disease, migraine headaches, serious infections, or prevention of nausea and vomiting. Ask your doctor before making any changes in how or when you take your medications.

To make sure Ionsys is safe for you, tell your doctor if you have:

  • any type of breathing problem or lung disease;
  • a history of head injury, brain tumor, mental illness, alcoholism or drug addiction;
  • slow heartbeats;
  • seizures or epilepsy;
  • urination problems;
  • liver or kidney disease; or
  • problems with your gallbladder, pancreas, or thyroid.

It is not known whether Ionsys will harm an unborn baby. If you use Ionsys while you are pregnant, your baby could become dependent on the drug. This can cause life-threatening withdrawal symptoms in the baby after it is born. Babies born dependent on habit-forming medicine may need medical treatment for several weeks. Tell your doctor if you are pregnant or plan to become pregnant.

Fentanyl can pass into breast milk and may harm a nursing baby. Tell your doctor if you are breast-feeding a baby.

Ionsys side effects

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

Tell your caregivers right away if you have any of these serious side effects:

  • a light-headed feeling, like you might pass out;
  • severe weakness,
  • slow heart rate, sighing, weak or shallow breathing;
  • cold, clammy skin;
  • low red blood cells (anemia) - pale skin, feeling light-headed or short of breath, rapid heart rate, trouble concentrating; or
  • symptoms of serotonin syndrome - agitation, hallucinations, fever, sweating, shivering, fast heart rate, muscle stiffness, twitching, loss of coordination, nausea, vomiting, or diarrhea.

Breathing problems may be more likely in older adults.

Common Ionsys side effects may include:

  • nausea, vomiting;
  • feeling dizzy or light-headed;
  • headache;
  • painful or difficult urination;
  • low red blood cells; or
  • itching or redness where the device was worn.

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.

How is Ionsys used?

Ionsys is used only while you are in a hospital. A healthcare provider will place the device on your chest or upper arm where you can reach it. A healthcare provider should also remove or replace the device when needed. Do not leave the hospital with a device on your skin.

Fentanyl can slow or stop your breathing. Use this device only as directed.

Fentanyl may be habit-forming, even at regular doses. Never share an Ionsys transdermal device with another person, especially someone with a history of drug abuse or addiction. MISUSE OF NARCOTIC MEDICINE CAN CAUSE ADDICTION, OVERDOSE, OR DEATH, especially in a person using the medicine without a prescription. Selling or giving away Ionsys is against the law.

To release fentanyl from the device, press the dosing button twice. A beep will sound when the dose starts, and a green light will blink for 10 minutes while the dose is delivered. The device can only be activated once every 10 minutes. Tell your doctor if Ionsys seems to stop working as well in relieving your pain.

While you are wearing this device, only you should press the dosing button to control your pain. Do not allow others to press the dosing button for you, or you could receive a fatal overdose.

Never allow a family member or visitor to touch or handle the Ionsys transdermal device. It should be handled only by a healthcare professional. Do not remove or reposition the device yourself. The sticky side of the device contains a high concentration of fentanyl, which could cause a fatal overdose if the medicine gets on your skin. Tell your care provider if the device comes loose or falls off.

The device is worn for 24 hours or until it has delivered 80 doses of fentanyl.

The Ionsys transdermal device may burn your skin if you wear the device during an MRI (magnetic resonance imaging). Certain other medical tests can cause damage to the Ionsys transdermal device. Remove the device before undergoing an MRI, CT scan, x-ray, or similar test.

What happens if I miss a dose?

Since Ionsys is applied by a healthcare professional in a hospital setting, it is not likely that you will miss a dose.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222. A fentanyl overdose can be fatal. Overdose symptoms may include slow breathing and heart rate, severe drowsiness, muscle weakness, cold and clammy skin, pinpoint pupils, and fainting.

This medication is for use only on the skin. Avoid touching the gel inside a device with your fingers. Only a healthcare provider wearing gloves should handle an Ionsys transdermal device.

Do not drink alcohol. Dangerous side effects or death could occur.

This medication may impair your thinking or reactions. Do not drive or operate machinery until you know how Ionsys has affected you. Dizziness or severe drowsiness can cause falls or other accidents.

What other drugs will affect Ionsys?

Some drugs can raise or lower your blood levels of fentanyl, which may cause side effects or make Ionsys less effective. Tell your doctor if you also use certain antibiotics, antifungal medications, heart or blood pressure medications, or medicines to treat HIV or AIDS.

Fentanyl can interact with many other drugs and cause dangerous side effects or death. Be sure your doctor knows if you also use:

  • other narcotic medications - opioid pain medicine or prescription cough medicine;
  • drugs that make you sleepy or slow your breathing - a sleeping pill, muscle relaxer, sedative, tranquilizer, or antipsychotic medicine; or
  • drugs that affect serotonin levels in your body - medicine for depression, Parkinson's disease, migraine headaches, serious infections, or prevention of nausea and vomiting.

This list is not complete. Other drugs may interact with fentanyl, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed in this medication guide.

Common questions about Ionsys

What drugs cause pinpoint pupils?
Pinpoint pupils, medically termed miosis, refer to abnormally small, constricted pupils that do not dilate appropriately in low light. This symptom can be caused by opioids, clonidine, buspirone, metoclopramide, and other medications. Continue reading
Which drugs cause opioid-induced constipation?
Any drug that is classified as an "opioid" can cause constipation, which can be a serious side effect if not addressed. Examples of commonly prescribed opioids that may cause this side effect include morphine, tramadol, fentanyl, methadone, hydrocodone, codeine and oxycodone. Continue reading
How long does Fentanyl stay in your system?
Traces of fentanyl can stay in your system for a lot longer than it takes for the effects of fentanyl to wear off. Drug testing can detect fentanyl or its metabolites (breakdown products) in urine for 24 to 72 hours, in blood for 5 to 48 hours, and in hair for up to 3 months, but it cannot be consistently detected in saliva. Continue reading
Carfentanil vs Fentanyl: Which is more dangerous?
Both illegally-made fentanyl and carfentanil are extremely dangerous opioids that may result in a quick overdose and death when abused, but carfentanil is more potent than fentanyl. Multiple doses of the anti-overdose drug naloxone (Narcan) or nalmefene (Opvee) may not be effective to reverse an overdose. Continue reading
Fentanyl test strips: where to get & how to use?
Fentanyl test strips can be found at your local health department, at a community needle-exchange program, from reliable online sources, or even vending machines in some states. Once the strip is dipped into a sample of the drug (usually dissolved in a small amount of water), the results indicate if fentanyl is present. Follow the instructions for use on your specific test strips. Continue reading
Why is fentanyl so dangerous?
Fentanyl is a powerful opioid that can be deadly when misused or taken in an overdose. It can quickly slow or stop breathing, especially in people who are not used to its effects. Combining fentanyl with alcohol, benzodiazepines, gabapentinoids, other opioids, or other depressants greatly increases the risk of overdose and death. Continue reading
What are the symptoms of a fentanyl overdose?
Illicit Fentanyl, a potent synthetic opioid, is a leading cause of U.S. overdose deaths. Often mixed with other drugs, it can rapidly depress breathing and cause death. Recognizing overdose signs like extreme drowsiness, slowed breathing, constricted pupils, cyanosis (blue lips, skin, fingernails), seizures, or coma is critical for timely emergency intervention. Continue reading
How does fentanyl compare to heroin or other opiates?
Fentanyl is an extremely potent, synthetic (man-made) opioid, and is about 50 times more potent than heroin and 100 times more potent than morphine. Fentanyl is a legally prescribed drug for pain in the U.S. and is classified as Schedule II controlled substance when used for legitimate medical purposes. In contrast, heroin is 2 to 3 times more powerful than morphine. Heroin is illegal in the U.S. and is classified as a Schedule I controlled substance. Continue reading

Related medicines

Before you take this medicine: the information on this page is general and may not cover your personal circumstances. Read the label supplied with your medicine and ask a pharmacist or doctor if you are unsure, especially if you are pregnant, breastfeeding, taking other medicines or managing a long-term condition.
General medicine information Consumer-friendly language Source: Drugs.com

Content is provided for education and is not medical advice. See our medical disclaimer. Source page medically reviewed by Carmen Pope, Senior Medical Editor, B. Pharm on March 20, 2026.