When I had mine, I was put on high doses of flagyl and cipro, and I was also on remicade.
I know you are going to think this is crazy, because I did at first also, but my ob/gyn suggested that after I get out of the shower, I dry that area down there with a blow dryer on cool. After it was completely dry, he wanted me to put on a coat of crisco. So, I thought what the heck...it's not going to hurt, so I gave it a try, and it worked wonders for the irritation that the constant drainage causes. I would also wear a pad to catch the drainage.