What is Oxyfast?
Oxyfast is an opioid pain medication used to treat moderate to severe pain.
The extended-release form of oxycodone is for around-the-clock treatment of pain and should not be used on an as-needed basis for pain.
Oxyfast may also be used for purposes not listed in this medication guide.
Oxyfast side effects
Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Opioid medicine can slow or stop your breathing, and death may occur. A person caring for you should give naloxone and/or seek emergency medical attention if you have slow breathing with long pauses, blue colored lips, or if you are hard to wake up.
Oxyfast may cause serious side effects. Call your doctor at once if you have:
noisy breathing, sighing, shallow breathing, breathing that stops during sleep;
a slow heart rate or weak pulse;
a light-headed feeling, like you might pass out;
confusion, unusual thoughts or behavior;
Serious breathing problems may be more likely in older adults and in those who are debilitated or have wasting syndrome or chronic breathing disorders.
Common side effects of Oxyfast may include:
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.
MISUSE OF OPIOID MEDICINE CAN CAUSE ADDICTION, OVERDOSE, OR DEATH. Keep the medication in a place where others cannot get to it.
Taking opioid medicine during pregnancy may cause life-threatening withdrawal symptoms in the newborn.
Fatal side effects can occur if you use opioid medicine with alcohol, or with other drugs that cause drowsiness or slow your breathing.
Before taking this medicine
You should not use Oxyfast if you are allergic to it, or if you have:
severe asthma or breathing problems; or
a blockage in your stomach or intestines.
You should not use Oxyfast unless you are already using a similar opioid medicine and are tolerant to it.
Most brands of oxycodone are not approved for use in people under 18. OxyContin should not be given to a child younger than 11 years old.
Tell your doctor if you have ever had:
breathing problems, sleep apnea;
drug or alcohol addiction, or mental illness;
liver or kidney disease;
urination problems; or
problems with your gallbladder, pancreas, or thyroid.
If you use opioid medicine 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 opioids may need medical treatment for several weeks.
Ask a doctor before using opioid medicine if you are breastfeeding. Tell your doctor if you notice severe drowsiness or slow breathing in the nursing baby.
How should I use Oxyfast?
Follow the directions on your prescription label and read all medication guides. Never use Oxyfast in larger amounts, or for longer than prescribed. Tell your doctor if you feel an increased urge to take more of Oxyfast.
Never share opioid medicine with another person, especially someone with a history of drug abuse or addiction. MISUSE CAN CAUSE ADDICTION, OVERDOSE, OR DEATH. Keep the medication in a place where others cannot get to it. Selling or giving away opioid medicine is against the law.
Stop taking all other around-the-clock opioid pain medicines when you start taking extended-release Oxyfast.
Take Oxyfast with food.
Swallow the capsule or tablet whole to avoid exposure to a potentially fatal overdose. Do not crush, chew, break, open, or dissolve.
If you cannot swallow a capsule whole, open it and sprinkle the medicine into a spoonful of pudding or applesauce. Swallow the mixture right away without chewing. Do not save it for later use.
Never crush or break an Oxyfast pill to inhale the powder or mix it into a liquid to inject the drug into your vein. This can cause in death.
Measure liquid medicine carefully. Use the dosing syringe provided, or use a medicine dose-measuring device (not a kitchen spoon).
You should not stop using Oxyfast suddenly. Follow your doctor's instructions about tapering your dose.
Store at room temperature, away from heat, moisture, and light. Keep track of your medicine. Oxyfast is a drug of abuse and you should be aware if anyone is using your medicine improperly or without a prescription.
Do not keep leftover opioid medication. Just one dose can cause death in someone using this medicine accidentally or improperly. Ask your pharmacist where to locate a drug take-back disposal program. If there is no take-back program, flush the unused medicine down the toilet.
What happens if I miss a dose?
Since Oxyfast is used for pain, you are not likely to miss a dose. Skip any missed dose if it is almost time for your next dose. Do not use two doses at one time.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222. An opioid overdose can be fatal, especially in a child or other person using the medicine without a prescription. Overdose symptoms may include severe drowsiness, pinpoint pupils, slow breathing, or no breathing.
Your doctor may recommend you get naloxone (a medicine to reverse an opioid overdose) and keep it with you at all times. A person caring for you can give the naloxone if you stop breathing or don't wake up. Your caregiver must still get emergency medical help and may need to perform CPR (cardiopulmonary resuscitation) on you while waiting for help to arrive.
Anyone can buy naloxone from a pharmacy or local health department. Make sure any person caring for you knows where you keep naloxone and how to use it.
What should I avoid while using Oxyfast?
Do not drink alcohol. Dangerous side effects or death could occur.
Avoid driving or operating machinery until you know how Oxyfast will affect you. Dizziness or severe drowsiness can cause falls or other accidents.
Avoid medication errors. Always check the brand and strength of oxycodone you get from the pharmacy.
What other drugs will affect Oxyfast?
You may have breathing problems or withdrawal symptoms if you start or stop taking certain other medicines. Tell your doctor if you also use an antibiotic, antifungal medication, heart or blood pressure medication, seizure medication, or medicine to treat HIV or hepatitis C.
Opioid medication can interact with many other drugs and cause dangerous side effects or death. Be sure your doctor knows if you also use:
other opioids--opioid pain medicine or prescription cough medicine;
drugs that make you sleepy or slow your breathing--a sleeping pill, muscle relaxer, medicine to treat mood disorders or mental illness; or
This list is not complete and many other drugs may affect Oxyfast. This includes prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are listed here.
Any drug that is classified as an "opioid" can cause constipation. Examples of commonly prescribed opioids that may cause this side effect include morphine, tramadol, fentanyl, methadone, hydrocodone, codeine and oxycodone. Continue reading
Immediate-release oxycodone has a half-life of just under 4 hours which means the pain-relieving effects of one dose will be gone within 6 to 24 hours, but it can remain detectable in saliva, urine, and hair for much longer. In saliva, oxycodone is detectable within minutes of taking it and lasts for up to 48 hours (2 days). Oxycodone is detectable in urine within 1 to 3 hours and will stay detectable for 1 to 4 days. Like most other opioids, oxycodone is detectable in hair for up to 90 days. Continue reading
How long opioid withdrawal lasts depends on the opioid you have been taking and whether it is a short-acting or long acting opioid.
If you have been using a short-acting opioid, acute opioid withdrawal lasts 4 to 10 days, with withdrawal symptoms starting 8 to 24 hours after last use.
If you have been using a long-acting opioid, acute opioid withdrawal lasts 10 to 20 days, with withdrawal symptoms starting 12 to 48 hours after last use. Continue reading
Oxycodone and Oxycontin are essentially the same substance, but the main difference is that Oxycontin is a long-acting form of oxycodone. Oxycontin releases oxycodone slowly and continuously over 12 hours and only needs to be given twice a day. Oxycodone is short-acting and relieves pain for about 4 to 6 hours so needs to be given four to six times a day to provide all-day pain relief. Oxycodone is usually given for acute pain, such as that following surgery or trauma, whereas Oxycontin may be given for chronic or long-term pain, such as that caused by cancer. Oxycontin should only be considered in those with chronic severe pain that have already found a trial of oxycodone to be beneficial. Continue reading
Immediate-release oxycodone starts to work quickly, within 10 to 30 minutes, but it may take up to 1 hour for it to be fully absorbed, and the full effects reached. Food can delay how quickly oxycodone takes to work, but not how much is absorbed. Continue reading
Withdrawal from oxycodone is likely to happen to people who have taken oxycodone consistently or misused oxycodone. Common symptoms of withdrawal include:
- Cravings for oxycodone – these are one of the main symptoms that drive relapse
- Fast heartbeat
- High blood pressure
- Muscle aches
- Nausea or vomiting
- Sleep disturbances/Insomnia
- Stomach cramps
- Which painkiller should you use?
- Oxycodone vs Hydrocodone - How do they compare?
- What is Hydrochloride or HCL in a drugname?
More about Oxyfast (oxycodone)
- Check interactions
- Compare alternatives
- Reviews (4)
- Latest FDA alerts (3)
- Side effects
- Dosage information
- During pregnancy
- Drug class: Opioids (narcotic analgesics)
Related treatment guides
Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Copyright 1996-2023 Cerner Multum, Inc. Version: 16.01.