Since I had knee surgery a couple of years ago, I have been suffering from incontinence -- not leaking or 8tsp a day), but more of a Niagara Falls, usually with no notice. My physician prescribed 5mg of oxybutynin, which worked for a little while, but I was then prescribed 10mg, and that works just fine It is a round light pink pill with the inscription EM2 in black on one side. When Humana sent the next refill, it was a round pink pill, darker in color than the EM2. The pill had an etched identifier, not a black printed one.Using a magnifying glass, I was able to identify the following numbers: Is it possible the pills are not the same? I have separated into two bottles and will take only the ones from the new refill to see if I have a problem. I have been having accidents 2 and 3 times a day, which had been eliminated by the 10mg pill. Do you have any suggestions?