The medication makes my heart beat fast...

I used to hate getting prescribed medication and I would be scared of trying pills for the first time because you never knew what was going to happen. But now, i'm so grateful for the few drugs I am actually allowed to take that I see medication in a different way now - The fact that you don't know what is going to happen when you take it doesn't scare me anymore. I would take pretty much anything they give me if it made me feel better. Unfortunately I don't have that option... The doctors gave up prescribing me medication after I took one that stopped me walking for a few weeks. Even if they would prescribe me something, is there actually anything, out of all the thousands of drugs they created, that would actually get rid of my symptoms?