I have been prescribed Donepil, atorvastain 20 mg,and Januvia. I am diabetic N0 shots. I take metformin, medication, as needed. heart medication and thyroid mediction. I went to emergency room last night due to chest pains which was diagnosed as stress related. I take The following meds were prescribed - donezil,atorvastin 20 mg, and Januvia. I am concerned about any drug interications.