Janssen Pharmaceutica | Alfenta (Medication)


Alfenta/alfentanil hydrochloride is an opioid analgesic with a rapid onset of action. Alfentanil should be used only in a hospital or clinical setting that has proper monitoring and support equipment. Alfentanil is a narcotic pain medication used before and/or during surgery.

The dosage is based on the patient's medical condition and response to the medication. ...

Side Effect:

Inform the doctor immediately if any of these serious side effects occur:low or high blood pressure, slow or irregular heartbeat, tightness in the chest, trouble breathing.

Opioid analgesics have been associated with abuse and dependence in health care providers and others with ready access to such drugs. Respiratory events reported during MAC included hypoxia, apnea, and bradypnea. Other adverse events reported by patients receiving Alfenta in order of decreasing frequency, were nausea, hypotension, vomiting, pruritus, confusion, somnolence and agitation.

Alfenta may produce muscular rigidity that involves the skeletal muscles of the neck and extremities. The most common adverse reactions of opioids are respiratory depression and skeletal muscle rigidity, particularly of the truncal muscles.

Seek immediate medical attention if you experience any of the following symptoms of an allergic reaction:rash, swelling, trouble breathing. ...


This drug will make the patient dizzy and/or drowsy. They should not engage in activities requiring alertness such as driving or using machinery until the effects of this drug have worn off. Patients should avoid drinking alcohol because it can intensify the dizziness or drowsiness effects of this drug.

Caution is advised when using this drug in the elderly since they may be more sensitive to the effects of the drug.

During pregnancy and breastfeeding is not recommended to use this medicine without your doctor's advice. ...