Split and simplify the following sentence while retaining its full meaning: In addition to the drug related adverse reactions described above , adverse events ( reported regardless of causal relationship to medicinal product ) occurring in at least 5% and more commonly in patients treated with sitagliptin included upper respiratory tract infection and nasopharyngitis .
 Simplified version:
In addition to the drug-related adverse reactions described above , adverse reactions have been reported regardless of the causal relationship with the drug in at least 5% of patients , and more frequently in those treated with sitagliptin . They included upper respiratory tract infections and nasopharyngitis .