why does chemotherapy make you lose wieght?

[ana]

i always hear when you get chemo therapy for cancer you lose weight??

[tinmuning]

Chemotherapy can either cause weight gain or loss, it really differ in certain patients. If you're concerned about weight loss, possible causes can be:
a. patients have poor appetite during chemotherapy
b. chemotherapy can cause nausea & vomiting
c. diarrhea

[ana]

Thank you for your informative reply.