The purpose of this study is to compare the incidence hospitalization for severe hypersensitivity and cutaneous reactions among patients with type 2 diabetes who are new users of saxagliptin and those who are new users of other oral antidiabetic drugs.

Prospectively designed retrospective database study. This study will be conducted using administrative claims data and electronic medical records that are collected as part of routine clinical practice

Inclusion Criteria:

• 18 years of age or older
• Newly prescribed saxagliptin or an Oral Anti-diabetic Drug (OAD) in a class other than Dipeptidyl peptidase IV (DPP4) inhibitors
• Enrolled in the respective database for at least 180 days prior to first prescription of new OAD
• Have at least one diagnostic code for a type 2 diabetes-related condition

Exclusion Criteria:

• Patients with an inpatient diagnostic code for any of the conditions of interest within the 180-day baseline period
• Patients prescribed a DPP4 inhibitor during the baseline period

This study will be carried out using databases containing administrative claims data (HealthCore Integrated Research DatabaseSM (HIRD) and Medicare in the U.S.) and electronic medical records (General Practice Research Database (GPRD) and The Health Improvement Network (THIN) in the UK). The US population includes patients from health plans in the northeast, southeastern, mid-Atlantic, central, mid-western, and western regions (HIRD) as well as US citizens 65 years of age and older (Medicare). The UK population includes patients seeking medical care from general practitioners (GPRD and THIN)