Which of the following is a common side effect of chemotherapy?

Hair loss is commonly associated with chemotherapy due to its effects on rapidly dividing cells in the body. Chemotherapy targets not only cancer cells but also other rapidly dividing cells, including those in hair follicles. This disruption in the normal growth cycle of hair cells leads to hair thinning or complete loss during treatment.

While undergoing chemotherapy, patients often experience a range of side effects related to this targeting of healthy cells, which can include nausea, fatigue, and changes in appetite. However, increased energy levels and enhanced immune function are generally not seen as side effects of chemotherapy, as the treatment can actually lead to a decrease in immune function and increased fatigue. Weight gain may also occur for some patients, but it is not a typical side effect associated with chemotherapy in the same way that hair loss is.