I have had several instances where I have been prescribed this medication and it never works for me. No matter what the dosage is, it never seems to relieve any pain symptom I have. I must have a high tolerance as this medication does nothing for me, other than make my chest really, really tight. Every time I take this medication my chest feels like someone is sitting on my chest. Effectiveness It really does nothing for my pain symptoms, no matter how mild they are. Ease of Use Very easy to use this product. They do have variations to this medication to accommodate people. It can become a highly addictive medication over time, because an original dosage does not work the same for very long, which will prompt an increase in the dosage. Immediacy I have not experienced any immediacy regarding alleviating any symptoms of pain. I think for me this is a medication my body does not tolerate, therefore will not work for me specifically.