hi Marc, welcome to PC
Have you asked your wife why she doesn't want to take her meds? If she has any specific concerns -- side effects, fear of dependence, cost, etc -- then maybe you could find a way to address each one separately in order to make her feel a bit more secure.
A lot of people don't want to take meds because they're afraid of what it means. There is such a stigma attached to mental illness that to be prescribed medication because your MIND is sick is just too difficult for many people to handle, more shameful than the illness itself. It's a scary thought that you might need to be on medication for a long time (if not the rest of your life) just to be stable and "normal". It took me a long time to get medicated for depression because I was afraid of what it would mean if I started taking medicine for a mental illness. It would make it official, it would mean that I really was different from everybody else, that I really did have something terribly wrong with me, and for a long time I was so ashamed I couldn't face that and preferred to keep on suffering instead. I set back my recovery by months because of that fear. Make sure you stress to your wife that her illness is nothing to be ashamed of, and you want her to take her meds because you don't want to see her suffer any more, not because you're in any way ashamed of who she is when she's not on them. It can be very difficult for people suffering from a mental illness to come to terms with the fact that mental illness is nothing to be ashamed of. I don't know your wife or what she's thinking, that's just the way I'd probably feel if I were in her position.
Keep us posted on how things are going, and good luck with everything.