Is low-dose aspirin enough to stop a clot?

Dear Dr. Roach: You have written numerous articles about low-dose aspirin and its effects concerning heart problems. My doctor recommended that I take low-dose aspirin years ago, and I have been taking them since. I am 74 years old and in good physical health with no heart problems and none in my family. However, I have had a blood clot and two of my older brothers have had blood clots. Therefore, my doctor’s recommendation is due to the clots. You have never spoken to the efficacy of low-dose aspirin for blood clots. Please advise whether you think it is worth continuing. —…