Sir i had been tested positive for vdrl i got penicillin injection 3 times when my vdrl will became negative?

Syphilis testing: Your doctor must have checked you and found this positive lab result. After the appropriate treatment - which it sounds like you got, you need to follow up with that doctor to make sure the number goes down by a certain amount. Usually a patient follows up in 3, 6 and 12 months. See the section on VDRL in this article: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3312652/#__abstractid512525title