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

Nausea is a well-known and common side effect of chemotherapy due to the drugs' effects on rapidly dividing cells, including those in the gastrointestinal tract. Chemotherapy can disrupt the normal functioning of these cells, leading to symptoms such as nausea and vomiting. This side effect is not only uncomfortable but can also significantly affect a patient's quality of life and nutritional intake during treatment.

In contrast, increased energy levels and improved appetite are typically not associated with chemotherapy; many patients may experience fatigue and reduced appetite instead. Hair regrowth is also not a side effect of chemotherapy, but rather a phase that occurs after treatment has completed, as hair may fall out during the treatment process itself. Understanding these effects is crucial for oncology nursing, as managing side effects can play a vital role in patient care and support throughout treatment.