Opioids are measured in binding strength (and so pain relief) with morphine as the baseline which ranges from x0.5-x1 for light opioids like Codine to x100 for

Opioids are measured in binding strength (and so pain relief) with morphine as the baseline which ranges from x0.5-x1 for light opioids like Codine to x100 for Fentanyl. Non opioid pain killers like ibuprofen are usually 1/200-1/300th of morphine.