What medication do you take for your POTS?

What medication do you take for your POTS and does it work for you? If so, what type of POTS do you have?

I have been on propranolol for over a year but recently it hasn't been working that well for me anymore. I have an appointment with my doctor on Wednesday and I want to discuss this and ask about possibly changing my medication but wanted to hear from others about what has been effective for them.