Could any of u docs tell me if i stopped taking lorazepam after 8 years abruptly what might the consecensious would be ?

Depends, but: If the dose is high enough (not much needed to qualify) seizures might occur; and very likely rebound anxiety that might be much worse than the initially intended to be treated. Questionable idea as a long term treatment, really bad idea to stop without consulting the prescribing dr. Don't do it on your own.

Get guidance: I see that you are also on diazepam and propanolol. Don't discontinue prescribed meds abruptly, especially not a benzo, without supervision. People have seized and even perished -- not to say that you will, but this isn't trivial. Best wishes.