List of order of strength opioids

[PieceByPiece]

Could someone tell me a list of opioids in order of strength?

From example I know codeine is weaker than morphine, but is Tramadol stronger than codeine? Ect?

So could someone give me a list like

Codeine
Dihydrocodeine
Tramadol
Morphine
Ect ect

In order from strongest to weakest.

 

[Ignio]

On this Wikipedia links https://en.wikipedia.org/wiki/Equianalgesic you can find a table comparing the potency of opiats and opioids relative to morphine.

 

[LaBlueEyes]

Great link

 

[T. Calderone]

The charts aren't going strongest to weakest but will give you an idea of strengths:

http://www.globalrph.com/narcotic.htm
http://www.bluelight.org/vb/threads/564885-Opioid-Conversion-Chart

 

[Hockeyguy99]

What this difference between methadone (acute) and methadone (chronic)?

 

[Kittycat5]

Methadone and morphine, depending on the dose, do not exhibit complete cross tolerance. There are different scales but basically for patients on chronic oral morphine therapy, the higher the dose of daily morphine, the greater the morphine/methadone conversion is. For instance, someone on 200mg daily morphine the ration is about 6:1. So the methadone equivalent dose would be somewhere between 35-40mg. If someone was on 1000mg of morphine daily, the ratio is more like 20:1 so the methadone equivalent daily dose would be roughly 50mg.

With acute dosing of morphine that is being switched to acute methadone, it is not as big a deal and the equianalgesic ratios of morphine to methadone range anywhere from 1:1 to 6:1.

Methadone is also a highly variable drug among different patients. Differences in both pharmacokinetic and pharmacodynamic measurables can vary by 100 fold or more. There are many reasons for this which I could go into, but basically it is very difficult to get the exact dose of methadone right, especially if converting from other opioids, without extreme vigilance.