On the expired lovenox, just be sure that nothing has precipitated out of the solution. In other words, you shouldn't see any flakes or granules in the liquid. You also don't want to see any color change, or any kind of change from the normal appearance of the product, at all. Otherwise, as long as it looks okay, using it shortly after expiration is probably fine, in my personal opinion. (Bear in mind, I'm a patient and not a doctor or a pharmacist.