Federal Register Notice: FDA has determined that Zovirax (acyclovir sodium) injection, equivalent to 250 mg base/vial, 500 mg base/vial, and 1g base/vial, was not withdrawn from sale for reasons of safety or effectiveness. This determination will allow FDA to approve ANDAs for Zovirax (acyclovir sodium) Injection, EQ 250 mg base/vial, 500 mg base/vial, and 1 g base/vial, if all other legal and regulatory requirements are met. To view this notice, click here.