Can I Take Bromelain if Allergic to Pineapple?

Hi, I am allergic to Pineapples. When I eat pineapples I will vomit and have diarrhea. I do not get any other symptoms like hives or breathing problems. It's just for some reason my stomach hates the fruit. I see that bromelain is made from pineapples. Does it have other ingredients or is it just made with pure pineapples? I'm wondering if it would be just like eating the pineapple fruit or if it might be different because it's a pill.