.The aim of this study is to evaluate the effectiveness of the education method given by using the documents shaped by the teach-back method in the management of the frequently encountered side effects in chemotherapy treatment and to develop an effective method that health professionals can use in patient education.

Cancer is one of the most common groups of diseases in the world today that human beings have to deal with. The lack of exact treatment, as well as the presence of a wide range of cancer types, makes treatment algorithms difficult and prolonging treatment processes. The prime treatment options for the treatment currently used are surgical treatment, radiotherapy and chemotherapy. Although surgical treatment is on the forefront of early cancer patients, radiation therapy and chemotherapy treatments are currently making progress and progress. The variety of medications used, the use of drugs with different actuators, and even the combination of different methods such as radiotherapy and chemotherapy in therapy, can increase the chances of success, but can lead to serious side effects. This reduces patient compliance and may lead to the end of treatments. Research of the methods and behaviors to improve patient/patient relatives' compliance and participation in treatment has gained speed, and studies have become widespread, noting the importance of these models, although studies for finding groups of low-side effects drugs are still in progress. When it comes to treatment and patient care, the center of the circle is the nurses who are the primary care giver. The most important task is for nurses to continue the treatment process effectively and to eliminate compliance problems for patient/patient relatives. The correct approaches to managing the treatment of a disease group with increased side-effect insidance such as cancer will increase the quality of life and treatment adaptation process of patients, allowing the treatment to end as soon as possible. Particularly during chemotherapy treatment, nausea, vomiting, indigestion, abdominal pain, fatigue, etc. in the management of complaints such as, it should be the main task of nurses working in the field to describe problems and methods of dealing with patients/patients before treatment. Brochure for treatment and possible side effects in the majority of treatment centers, etc. there are documents, but often documented by medical terminology, these documents lead to confusion in the patient/patient vicinity and are unable to serve their intended use. Most of the time, it is thought that the patient and his relatives have been trained and learned. But what he learned from education is not questioned. The aim of this study is to evaluate the effectiveness of the training method provided using the documentation shaped by the way that you describe what is common to the management of side effects in chemotherapy treatment and to develop an effective method that health care personnel can use in patient education.

Inclusion Criteria:

• First time chemotherapy,
• Patients over 18 years old
• Patients agree to participate in research
• Knowing and understanding Turkish
• IV and oral chemotherapy treatment
• Lack of communication problems and cognitive deficiency

Exclusion Criteria:

• He has been treated for chemotherapy before
• To receive radiation therapy with chemotherapy treatment

I will not present individual participant data to other researchers.