Red root along helps move Lymph fluid along. I use it daily in my herbs.
The thing to remember with Red root is that it can also make a person's blood hyper-coagulate. If a person already has issues with this, red root may not be a good choice.
But I agree with PeteZa, if you have not used either of those herbs together before, please don't start a combo of herbs, especially if you have a tendency to herx fairly easily.
Buhner recommends Danshen to replace red root. I believe Mister Mike takes Danshen. I am going to order it as it also has additional benefits.