Can high blood pressure due to preeclampsia affect somebody for the rest of their life?

Usually not: Preeclampsia BP usually goes away with delivery of the baby. You may have high BP in later life if you are already prone for it.

Excellent question!: Women with preeclampsia are at increased risk for chronic hypertension years later. Women who actually seized with eclampsia in their pregnancy show residual neurobehavioral subtle changes decades later (poor memory/focus). So, we are not telling the whole story when we say that preeclampsia is a pregnancy disorder, it has after-effects that persist long after the woman's reproductive life is over.