i switched from methadone to opana er due to back problems. opana is good, but expensive. my insurance will only pay for 2 tabs daily. my doctor has me on 5 15 mg. tabs per day and for a 2 weeks supply (70 tabs) it was $90. i have a $45 limit that i have to pay on prescriptions, but the pharmacist had to put it in as 1 month instead of 2 weeks, so they charged me 2 co-pays (2 x $45). he said in 2 weeks, they will probably reject paying for anymore, so i will probably have to pay the entire charge.