Fentanyl is a pain medication given to cancer patients by prescription only. Generally, individuals must be at least 18 years old to take it, or at least 16 for lozenges that go by the name of Actiq. Individuals should also be taking regular doses of another narcotic pain medication. Patients that take Fentanyl should be accustomed to the effects of narcotics since Fentanyl is classified as a narcotic. Fentanyl changes the way the brain and the nervous system react to pain according to the National Institutes of Health.
This pain medication comes in the form of lozenge, tablet under the tongue, a film and a buccal (between the gum and cheek) tablet, as well as, an injectable form. The way this medication works is that it gives sudden episodes of pain person taking it and it is advised not to be than more than four times a day.
An overdose of Fentanyl can cause drowsiness, dizziness, confusion, breathing problems, or smaller pupils.