I started using robinul a few weeks ago and at first, it worked really well with just one pill during the day and one pill at night. However, after 2 weeks it started to wear off and it seems like one pill is not enough to keep me dry. Has this happened to anyone else? It was working so well, but it lost its strength. I do not want to start taking too many pills because then when it gets to be summer next year, I will need to increase the dosage even more.