Hello, Thanks for your query. Very sorry to hear what you are going through. Unfortunately, this is a very, very common side effect of long-term narcotic usage, it wouldn t have matter if you were on Morphine, Oxycontin, Lortab, Vicodin or any of this class. These medications leech a lot of minerals from your body, including calcium, which is why some people on them long-term also end up with Osteoporosis or other bone related problems. Cut down the carbohydrates in your diet by restricting them to meal times and make the enamel less vulnerable to attack by getting lots of fluoride into it are the best way to deal with decay. The easiest way to do that is to get some fluoride toothpaste and when you’re finished brushing your teeth with it, rub it vigorously into the affected areas and DON’T rinse out afterwards. I do hope that you have found something helpful and I will be glad to answer any further query. Take care