a. I,am taking maintenance medication fo the following medicines; Warfarin 2.5 MWF 1.25 TTHS and Dutasteride 500mcg/400mcg once a day for my prostate issues, and Lanoxin half tablet of 250mcg . b. Five days ago, I was was with Clarithromycin (Calithrocid) 500 mg 2x a day as as per my doctor s prescription for a week,as treatment for possible underlying throat infection. c. My question is, are there any serious drug reactions in any medication I am taking in consideration with the new prescription, my doctor did not explain these to me, and I also miss the chance to ask. She is just a visiting (once a week)doctor and I could not reach her on her whenever I try to call her. Thank if you could give me some advice on this matter..