older medications like oxybutynin and tolterodine (as mentioned) have more side effects, but it is currently unproven that they are less effective than solifenacin (vesicare)% v5 J7 d: S" X: e* l6 v" G3 V% F
In canada you will be prescribed the older medications first as they are much cheaper, if you can tolerate the side effects then it won't matter.