It's only mildly hypotensive. Hypotension
is defined as BP <90/60. Low BP
is only ever a problem if you are symptomatic with dizziness
etc. If you are not symptomatic then there is no problem. The only negative effects would be if your BP dropped to low causing lack of blood supply to the brain.
Of course not alot can be ascertained from single BP readings. If for example your BP dropped from 130+ to 87 then this would be significant. Also, how was this reading obtained? BP is variable and single readings should never be considered diagnostic. If you are experiencing episodes of dizziness then see your Doctor. The good news is that you are at an significantly lower stroke