Hello, Welcome to Health Care Magic. I understand your concern. Although it is an effective treatment for many types of cancer, chemotherapy—like other cancer treatments—often causes side effects. The types and intensity of these side effects vary from person to person and depend on the type and location of cancer, the treatment dose, and the person s overall health. Different drugs cause different side effects. Although specific side effects may be predictable for certain classes of drugs, each person s experience with chemotherapy is unique. Common side effects caused by traditional chemotherapy drugs include: -Fatigue -Pain (as in your mothers case, abdominal cramps) -Nausea and vomiting -Diarrhea or Constipation -Hair loss -Appetite loss -Nervous system effects including dizziness etc. Hope I answered to your question. For further concerns, feel free to ask again.