Alfentanil is used as anesthetic for the induction of anesthesia in patients undergoing general surgery. It is also used as an analgesic for patients with severe diseases.


What is Alfentanil?

Alfentanil is an antagonist of opioid receptors. It works by reducing neuronal excitability.


How should Alfentanil be taken?

Alfentanil is administered via injection.


Side effects associated with Alfentanil

Among the possible side effects of alfentanil include the following:


  • Bradycardia
  • Nausea
  • Vomiting
  • Hypertension
  • Thoracic stiffness
  • Arrhythmias
  • Tachycardia
  • Asystole
  • Sinoatrial arrest
  • Muscle stiffness
  • Uncontrollable muscle movements
  • Apnea
  • Respiratory depression
  • Bronchospasm
  • Hypercarbia
  • Laryngospasm
  • Dizziness
  • Headache
  • Confusion
  • Euphoria
  • Chills
  • Itch
  • Urticaria
  • Pain at the injection site


It is important to contact a doctor immediately if you experience:


  • Rash
  • Urticaria
  • Itch
  • Difficulty breathing
  • Tightness in the chest
  • Swelling of the mouth, face, lips or tongue


Contraindications and warnings associated with the use of Alfentanil

Before starting treatment with alfentanil, it is important to tell your doctor if:


  • You have any allergies to the active substance, its excipients or to any other drugs or food
  • You are taking any other medications, herbal remedies or supplements
  • You are suffering (or have suffered) from any diseases or health problems
  • You are pregnant or breast-feeding