I just started taking Diltiazem 240 ER & Pradaxam 150mg for atrial fibrillation. I ve probably had AF for about 8 years but it just became more constant 1 month ago. The meds came after being checked out at the ER. I m having a severe headache, dizziness, nausea, constipation, tingling in hands/feet, change in vision after 2 days on meds. I have a cardiology appt. on Monday - new doc for me. Are these normal side effects? With this many is it safe to continue, stop or take 1/2? I don t want another trip to ER if I can avoid it.