Becky,

There are several things that are considered "blood thinners". A daily aspirin, Coumadin...(Heparin and Lovenox are injections in the abdomen, which I doubt they are giving). So, if it's an aspirin or Coumadin... they would be given for an irregular heart beat. An irregular heat beat can cause blood clots to form. The medicine is an attempt to prevent a stroke, heart attack, or treatment for a blood clot that is currently present in the legs, etc. With significant bruising...sounds like Coumadin. That drug requires blood work to determine the correct dosing of the medication. Perhaps you can ask your husband if they are drawing blood. Even if the dose is therapeutic, the bruising is common. Has he ever been told he has a murmur?

These medications do not affect blood pressure.

It is a shame that medications can't be kept consistent...even if it is a generic form of the medication... However, there are several drugs that are similar in their action that it does not cause any ill effect when given as a replacement. I hope that this is his case.

I hope that answers some of your questions...if not. please ask more. Perhaps your husband can provide you with more details on his medications.
Take care,
Betsy