 [ Symptoms ] i start with a healthy erection during sex but it never lasts very long could this be ed or some kind of mental block [ Disease ] i am going to say if your health care provider feels aspirin asa is sufficient for your blood thinning needs then i would go with that assessment your health care provider is in the best position to judge the situation because he or she knows your complete medical history in general it is not unusual to step down from a big gun blood thinner like warfarin coumadin at some point after a person has experienced a pulmonary embolism pe this is because the pe likely has stabilized by now that is you have not had more symptoms that would indicate the pe has gotten larger and now you only need an anticoagulant blood thinner to help prevent another clot aspirin therapy works quite well for this purpose hope this helps set your mind at ease