Hi @jacx70 and @fimac1 - Unfortunately, diarrhoea is a common side effect of Herceptin and I had it all the way through Phesgo. I don’t like to think how life would have been without Germoloids and loperamide! That said, yours sounds very severe, Jacx70. I definitely think you need to speak to your oncologist about this to ask if there is something other than loperamide that may work better for you.
xx
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