Why do you want my (and everyone elses) blessing for that? Any reason to think your therapist and/or psychiatrist wouldn't go for it if you told them? Any reason you don't want to tell them?

It's your choice whether or not you want to keep taking your meds. However, speaking from experience, it's typically better to involve a medical professional of some kind in changing meds when you're already taking them (especially something like lithium you have to keep at a specific level). You really don't want to throw yourself off the track by being too hasty. Again, speaking from experience.

My advice: Make an appointment with your therapist, sleep on it until then and talk to them about it when you meet with them.