What Are Effects Of Taking Indomethacin, Excedrin And Lasix Together?

Hello, I was just prescribed indomethacin and when I took it this morning per my directions, I became extremely lightheaded to the point of almost fainting. At the same time, I also took my extra strength Excedrin. It took 3 hours of me laying down to be able to get up and function again.I was unaware of the interactions of these two products. At the same time, I was also prescribed Lasix, which I've found to have an interaction as well.And advice?