Never use this drug if you are allergic – either to fentanyl or other narcotic pain drugs.
Your doctor should be monitoring you carefully when you are getting fentanyl injection. It will allow him or her to know whether the drug is working correctly and if you should continue with the treatment.
You should consult your doctor immediately if you notice bluish skin or lips, difficulty in breathing, chest pain, irregular heartbeats, or stiff muscles.
You should know that fentanyl or other narcotic drugs abuse could cause death or addiction, especially to people without a prescription.
Other drugs, if used together with fentanyl, can cause an adverse condition known as serotonin syndrome. Ensure that your doctor is aware if you are also taking medications for mental illness, depression, migraine headaches, Parkinson’s disease, prevention of vomiting or nausea or severe infections. Also, consult your doctor before making any changes in how you take the drug.