Taking synthyroid, niacin/81mg aspirin, simuvastatin, Claritin, metformin, glyburide, gralise, lisinopril hctz, omperazole. Have been taking cipro for a couple of months for a fistula in my abdomen. I was referred to a cardiologist for dizziness and he found tachycardia and gave me 12.5 coreg. Is all this medicine safe?