Can't help much I'm afraid as I seem to have had no side effects of Herceptin (same regime). I did have some side effects from Taxol (but not nausea). I am confident the side effects were Taxol not Herceptin, as the Taxol was for 12 weeks and the side effects either stopped or started to improve after I finished Taxol in spite of another 9 months on Herceptin. Was anything else administered? Anti nausea meds? One of the anti nausea meds sent me completely soporific, until my oncologist agreed to drop it (as I had no nausea).