Sherry,
Ask your onc if you can take evening primerose oil pill supplements (for their GLA content). There is not yet human proof of efficacy but in laboratory experiments GLA (whose mode of action is not the same as Herceptin) was synergestic with Herceptin.
Also for kidney support you may ask if CoQ10 pills are advisable.
Finally based on a reply by an onc to the question of "what to do if Herceptin does not work?" he said he would try adding low dose (because of poor general status & advanced age) Navelbine. The Herceptin+ Navebine combo has recently been shown to be an effective one.
http://www.ncbi.nlm.nih.gov/entrez/q...arch&DB=pubmed
http://ezinearticles.com/?Renal-Fail...ction&id=94137