Does being on herceptin (trastuzumab) for breast cancer cause you to gain weight?

Haven't seen that: Unlike some of the hormonal therapies, Herceptin (trastuzumab) should not cause weight gain except of course if the person is debilitated and the drug improves your condition...Then i would actually expect healthy weight gain. That I have seen.

No: Herceptin (trastuzumab) should not by itself cause weight gain. But some women do gain weight when they are taking chemotherapy or soon after they have completed their course of chemotherapy. Caution is advised in terms of eating mindfully eating in moderation and eat healthful foods(low in fat content).

No: Herceptin (trastuzumab) is not associated with weight gain. However sometimes weight gain can happen during or following chemotherapy due to the use of steroids prior to chemotherapy. However not related to Herceptin (trastuzumab) use.