After becoming a nuclear power in 1998, Pakistan pursued a policy of Minimum Credible Deterrence. The country transformed its policy from Credible Minimum to Full Spectrum Deterrence (FSD) in 2013. It is important to understand the reasons for this change. The study addressed questions: What were the factors which pressed Pakistan towards the transformation of its nuclear posture? Keeping in view FSD, is there any development in the nuclear force structure of Pakistan? How far FSD would ensure the credibility of the deterrent value of Pakistan’s nuclear forces? Transformation in the nuclear posture of Pakistan would be studied under the Theory of Nuclear Deterrence, which postulates that the sole purpose of a nuclear weapon is to stop an adversary from taking aggressive moves. The paper is aimed at evaluating the impact of the change in Pakistan’s nuclear posture on the overall strategic environment of South Asia. The study gives an objective analysis of the impact of FSD on Indo-Pak strategic interaction. The study concludes that FSD has successfully deterred the Indian Cold Start Doctrine (CSD) but remained unsuccessful in ensuring strategic stability. With the “New Normal,” India will continue to utilise its conventional superiority in its favour.