Aciclovir (Saphrivax) 50mg/g (5% w/w) Cream is an antiviral topical medication used to treat skin infections caused by the herpes simplex virus, such as cold sores or genital herpes. Each gram of the cream contains 50mg of aciclovir, which helps to reduce the severity and duration of outbreaks. The 5g tube is designed for local application to the affected area, and it works by preventing the virus from multiplying, thus aiding in faster healing and symptom relief. It is typically applied multiple times a day as directed by a healthcare provider.