The research was planned to develop the mobile application (Akil Mobil) that will be designed for parents who continue to use drugs for their children at home after their child is discharged from the hospital and after the discharge education is completed. The type of study is a randomized controlled experimental study.

The irrational use of drugs is a major problem all over the world. About half of the patients cannot use the drugs correctly. Over, under or misuse of drugs leads to waste of resources and poor health conditions. The patients and their relatives who manage the use of drugs at home are most important componenets in this regard. Administration of the medication at home to the children mostly lead by parents.

Despite being informed during discharge, parents can make many mistakes in adjusting the dosage, preparing and administering tablet, capsule, suspension forms of drugs. And there are difficulties in accessing reliable sources of information.

It is necessary to keep the knowledge and skills of the parents of children with chronic diseases, who uses drugs for a long time, up-to-date. Therefore, continuous and accessible training and support systems are needed. Recently, mobile applications that can be easily accessed from mobile phones have become widespread thanks to technological developments. Regardless of their socioeconomic level, anyone with a smartphone can use these applications. A mobile application with home drug preparation and application can provide information and support for parents in the preparation and administration of appropriate doses.

For this reason, the aim of this project is to develop and evaluate a mobile application (AkilMobil) that prevents parents who continue to use drugs for their children at home after their child is discharged from the hospital. The research is a randomized controlled experimental study. In the study, "Education Needs of Parents who Administering Medicines at Home Form", "Descriptive Information Form", "Parental Drug Preparation Information Evaluation Form", " Suspension Drug Administration Parent Evaluation Form", "Capsule Drug Administration Parent Evaluation Form", "Tablet Drug Administration Parent Evaluation Form", "Mobile Application Usability Questionnaire", "AkilMobil Expert Opinion Evaluation Form" developed by the researchers in line with the literature, and "STAI State Anxiety Inventory" developed by Spielberger et al. will be used.

In the application, there will be drug information, indications, effects, side effects, preparation and administration methods, instructions for use, drug interaction information, dose calculation and drug preparation videos of drugs that are frequently used in chronic diseases, which are understood by parents. Interaction with users will be provided with frequently asked questions and the opportunity to ask researchers directly. With this application, parents can prevent dose errors due to lack of information while preparing drugs at home and information pollution due to applying to incorrect and insufficient sources. The mobile application's ease of access, presentation of visual resources and providing understandable information are the original values of our work. It is a technological advance for rational drug use and quality health care.

Inclusion Criteria:

• Treating the disease condition and being discharged
• Continuing to use medication at home after discharge
• Parents should be able to speak and understand Turkish and be literate.
• Having an Android mobile phone for the mobile application
• Having the video call application on the mobile phone and accepting the video calling application to be made after 1 month
• Voluntary written and verbal informed consent has been obtained from the parents.

Exclusion Criteria:

• Parents' unwillingness to continue working at any stage of the research
• Termination of drug use due to the termination of their children's treatment

due to the development