I have been having a very hard time trying to find out what insurance covers this drug..the price has skyrocketed in the past 4 months and just recently gone up again..I already pay 300. A month for this medication..I can barely afford this price. This medication is the only drug that helps my chronic knee pain until I can get my knee replacement( in 2years) all docs said I had to wait because I was too young..what can I do? I don't want to take pills. What insurance covers nalbuphine?