What is zostex?

As an AI language model, I do not have access to a precise answer regarding "Zostex." However, based on my general knowledge, 'Zostex' may refer to the antiviral drugs used in the treatment of Shingles (herpes zoster) and other viral infections like cold sores or chickenpox. The active ingredient in Zostex is Acyclovir, which works by inhibiting the growth and spread of the herpes virus. Zostex is available in different forms such as tablets, capsules, and creams. Patients are advised to follow the instructions given by their doctor or pharmacist while taking Zostex, as it may have some side effects and interactions with other medications.