To research the prevalence and nature of DRP (Drug Related Problems) associated hospitalizations (hospitalizations due to problems\adverse effects of the medication treatment) .

Analyzing the main reasons for DRP associated E.R admissions\hospitalizations. identifying drug involved and percentage of DRP associated hospitalizations.

Monitoring the length of DRP associated hospitalizations. Evaluating LOS to hospitalized. Financial and other aspects will be measured.

Inclusion Criteria:

• Possible DRP based on the current literature, patient questionnaire and drug history, related laboratories test values, ICD-9 coding.

Exclusion Criteria:

• DRP cannot be established or suspected based on the assessment of the patient's lab results, symptoms, drug treatment and patient's questioning as well as physician diagnosis

18 years of age and above) admitted to the E.R and subsequently to hospital wards of the Hillel Yaffe medical center, Hadera, Israel.