My dad age 64 was prescribed celexa 20mg for anxiety. he takes losartan hctz 100 /12.5 januvia (sitagliptin) glyburide metformin aspirin lipitor. any problems?

Many interactions:: Aspirin and celexa (citalopram) can increase effects of glyburide causing lower blood sugar. Aspirin may reduce effects of losartan in lowering blood pressure. Celexa (citalopram) with aspirin may increase risk of bleeding. Sitagliptin may help control blood glucose levels thus requiring less glyburide. Sxs of low blood sugar: headache, dizziness, drowsiness, nausea, hunger, tremor, weakness, sweating, and fast heart beat.