tablets – 100 micrograms to 800 micrograms.nasal spray – 50 micrograms to 400 micrograms.patches – these release 12 micrograms to 100 micrograms of fentanyl every hour.The different types of fentanyl come in a range of strengths: This is to manage sudden flare-ups of pain that "break through" the relief the patches give. Sometimes your doctor may prescribe a fentanyl patch with a fast-acting painkiller. They're used for when pain lasts for a long time. Fentanyl patches take longer to start working but last longer. Some patches keep working after they've been removed as they "store" fentanyl under the skin. tablets, lozenges and nasal spray – usually only when you need them.patches – apply a new patch every 3 days (remove the old one first).How often you take or use fentanyl depends on the type that you've been prescribed: This means fentanyl is gradually released through the skin into your body. They're used for pain that is expected to last for a short time.įentanyl patches are slow-release. Your dose will depend on how bad your pain is, how you've responded to other painkillers and if you get any side effects from fentanyl.įentanyl tablets, lozenges, nasal spray and injections are fast-acting. This is particularly important because fentanyl can be addictive.ĭoses vary from person to person. are trying to get pregnant, are pregnant or breastfeedingįollow your doctor's instructions about how to use this medicine.have irregular heartbeats ( arrhythmia).have a head injury or condition that causes fits or seizures.are addicted to alcohol or a heavy drinker.have breathing difficulties such as asthma or a lung condition.have ever had an allergic reaction to fentanyl or any other medicines.Tell your doctor before starting this medicine if you: This is to reduce the risk of an overdose.įentanyl is not suitable for some people. Your doctor will work out how much fentanyl to give you depending on what dose of other opioids you have been taking. However, young children and older people are more likely to get side effects.įentanyl patches are usually only used if you've already been taking other strong opioid painkillers. Some patches can be used in children from the age of 2 years and over.
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