Nausea is an example. Not all chemotherapy causes nausea, but if you are taking medication that causes nausea, you will be given additional drugs to keep this under control. This is not to say that side effects can always be totally controlled, but your doctors and nurses will work with you to help you feel as comfortable as possible. Hair loss is another example. Not all chemotherapy causes hair loss, but if it does, your hair will grow back.
Chemotherapy works on cells that are dividing.
This means that side effects such as hair loss, nausea and vomiting, diarrhea, and changes in blood counts are more common, but they still do not affect all patients in the same way. Ask your doctor what side effects you should expect from your anticancer drugs. Everyone's body is different you may experience hardly any side effects or you may experience many of them. There is often no way to predict how you as an individual are likely to react until you begin the treatment. Experiencing side effects has nothing to do with whether or not the treatment is working.