Herceptin should not give you these side effects. Maybe it is the tomoxifen. Speak to your dr. about it.

When I started Tamoxifen I was very sick and week the first week I started it. After a couple of months they changed my meds. Let the doctor know what you are going through and try butter peacan ice cream it helps. Good lock and praying for you. I am 5 years now cancer free.

I started Tamoxifen several weeks ago I had some aches at first but now I have no reaction. Good luck

My onco allows Imodium. Also if you can hold anything down, the BRAT diet: bananas, rice, applesauce, toast. Most importantly, you need to stay hydrated.

Amanda,

Side effects to meds can occur within hours or days depending upon your body reactions . Although I am not on either med you listed, I know Letrozole , an aromatase inhibitor can cause stomach problems.

Please contact your oncologist 's office for information. I know that it is the weekend but there is always someone on call.

Good luck and feel better.

Hugs,
Cindy