Zydus Pharmaceuticals (USA) Inc. is voluntarily recalling four lots of Acyclovir Sodium Injection, 50 mg/mL, 10 mL and 20 mL vials, to the Hospital/User level after receiving several complaints of crystallization in vials.

Administration of crystalized Acyclovir Sodium Injection, 50 mg/mL has a potential of life-threatening adverse consequences including injection site inflammation of a vein and local reactions, damage and/or obstruction of blood vessels, which could induce clots, particularly in the lungs, the passage of the particulate matter into the bloodstream may lead to clots resulting in stroke, heart attack, decreased liver or kidney function or death of tissues or cells. To date, Zydus Pharmaceuticals (USA) Inc. has not received any reports of adverse events related to this product recall.

Acyclovir Sodium Injection, 50 mg/mL is indicated for the treatment of herpes simplex infections in immunocompromised patients, severe initial clinical episodes of herpes genitalis in immuno-competent patients, herpes simplex encephalitis, neonatal herpes simplex virus infection and varicella-zoster (shingles) infections in immunocompromised patients. The product is packaged in single-dose glass vials and was distributed nationwide in the USA to Cardinal Health, Amerisourcebergen Drug Corporation and Morris & Dickson Company LLC.