What can be done about my fathers hematomas that bleed at the drop of a hat?

My 96-year-old father's hematomas on his skin are becoming more frequent.  He is taking baby aspirin, atenolol, and enalapril which I was told contributes to this. However, his physician does not want to take him off of these medications due to the possibility of stroke. what can be done about this as the hematomas bleed at the drop of a hat?