"i have had two lower back surgeries (l4-l5) and (l5-s1) which has left me with severe pain in both feet and severe sciatica in the left leg radiating down to my left foot. i have tried oxycontin and oxycodone with limited success. now i take opana er 20 mg twice daily with about level 1 to 2 pain instead of the constant level 4 to 5 pain reaching level 7-8 when the dose wore off."