Night time gas ?

Can or would all of you replying to this post please list the BRANDS of vitamins that you take. I have surgery coming mid october but I thought I'd get a bottle or 2 of each to have on hand. It would be nice to avoid these "itols" from the beginning. Also, as I understand I will take a multi vitamin that has A,D,E & K  - a calcium - and possibly iron. Do you guys use just one mulit vitamin that has all of it...the ADEK?