I read your question carefully and I understand your concern. While TIA does confer a greater risk of stroke, it is not true that you are necessarily going to have one, greater risk doesn t mean something is going to happen. Furthermore if the source of the TIA is identified and addressed, that possibility is lowered even more. What he seems to have done is very good, Aspirin itself lowers the risk of stroke. At times when it is considered to be due to atherosclerosis of big vessels a statin is added as well as statin benefits go beyond the lipid lowering effect. Also a cardiac origin must be investigated and if found anticoagulants which are more appropriate than aspirin may be considered. I hope things work out for the best.