Lithiodiisopropylamine is used in the synthesis and application as initiators of ε-caprolactone polymerization; Also, it is an intermediate used in the synthesis of (3S,5S)-Atorvastatin Sodium Salt (A791735), which is a selective, competitive HMG-CoA reductase inhibitor. The only drug in its class specfically indicated for lowering both elevated LDL-cholesterol and triglycerides in patients with hypercholesterolemia.