Cost Issues 1. Write down your questions in advance, to make sure you remember to ask them all. Write down the answers, so that you can review them whenever you want. People decide to be part of a cancer prevention clinical trial for many reasons. Also, because study participants get regular and careful medical attention, some health problems may be found early.
Some people feel good about contributing to medical knowledge.
If the study agent turns out to be effective against cancer, it may help others. For example, prevention trials showed that aspirin helps prevent heart attacks, and now many people take aspirin daily on their doctor's advice. You need to weigh the possible benefits and possible risks for yourself. The list in the next section may help you do that. You also may find it useful to talk with family members or friends, your health care providers, and anyone you know who has been in a clinical trial.