Is Pradaxa safe to take?

I hope this question will be answered by a doctor or pharmacist on Fluther.

Since my last heart stent was inserted, about two years ago, I have been taking Pradaxa twice a day. So far, I have had no ill effects from it. My stomach now has a deep, aching feeling inside it.

Today, I happened to see a commercial for 1–800— BAD DRUG. Included in the ad was Pradaxa.

I realize this was a commercial by attorneys looking for money. But, is there any truth in this ad, that Pradaxa is causing bleeding in the stomach and in one’s brain?

Any solid medical advice would be greatly appreciated.