Drs should really know about side effects that Bactrim can cause and interactions with other meds. My brother was put on Bactrim and had MANY severe side effects. He passed away within 3 weeks after being on Bactrim. I am furious with his dr that put him on this knowing the other meds he was taking and the interactions with his regular meds. So, to everyone reading this, ask questions that Bactrim will not interfere with your regular meds!