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From my experience as a student, fentanyl is used often with versed for procedural sedation. Other than that, I've only seen it used in patch form post-op.
Looking it up in my drug book, it has the same mode of action as morphine - both bind to opiate receptors in the CNS to alter pain sensation and provide general depression of the CNS.
We use Fentanyl in NH on the ambulance, however we also carry morphine. I use fentanyl for patients with orthopedic injuries and for patients having an MI involving the right ventricle.
Fentanyl does reduce stimulation of cardiac muscle through the beta receptors although I do not know the exact mechanism of this. Fentanyl does not have the same effects on vasculature that morphine does because it does not cause a release of histamine. Studies also show giving patients doses of narcotics often masks the severity of their pain and increases overall mortality in ACS. There really is no need to give a narcotic for vascular dilation when we give nitroglycerin SL and in my service we can even hang IV NTG in the ambulance or put on paste. We also give lopressor which has been shown to decrease mortality by about 30%. The only true value of narcotics in teh MI patient may be to help with sympathetic stimulation secondary to the anxiety one would have, which fenatly does, and since it does not cause the vascular dialtion that morphine does it is much safer for those patients who can easily be killed by NTG and other drugs that reduce preload and afterload such as those having a right V. MI.
Ok I am getting of the soap box now.
Swtooth
Swtooth is right on....although morphine and fentanyl work by the same mechanism (through agonism of the mu opioid receptors), it does not cause a histamine release like morphine does, which is the reason for the decrease in afterload. I have never heard of fentanyl being given for MI, mainly for the reason above, but also because fentanyl is such a short acting drug, I can't see that it would have much benefit in the MI patient.
Antikigirl, ASN, RN
2,595 Posts
This is actually a question of my huband who is a paramedic. The local paremdics/emts want to know about a new protocol they have, and I don't blame them! They are trying to replace morphine on the ambulances with Fentanyl. Many fear that it doesn't have the MONA potential for MI...but someone says it does (Hubby was on the phone and couldn't elaborate..but asked me to post this for comment).
Now...my hospital does not use Fentanyl unless in patch form..and I will find out why (we use morphine IV or Dilaudid IV..then I try to get my ortho pts on po quickly when tolerated for longer effects and antispasmotics). So I don't deal with cardiac effects as much...but as I recall..fentanyl never was mentioned as cardiac???
Anyone have insight?