Acyclovir cream 5 % is a topical antiviral medication used to treat recurrent herpes simplex infections of the skin. Its active ingredient acyclovir works by inhibiting the viral dna polymerase enzyme that is essential for viral replication. By blocking this enzyme the cream prevents the virus from synthesizing new dna and therefore stops the spread of infected cells in the epidermis. This action reduces the duration and severity of lesions and promotes faster healing of the skin lesions caused by the herpes virus. The sustained release of acyclovir at the site of application allows high local concentrations while minimizing systemic exposure. The cream is formulated with a hydrophilic base that facilitates penetration of the drug through the stratum corneum into the underlying skin layers. The resulting antiviral effect provides therapeutic benefit by decreasing viral load and supporting the skin's natural repair processes.

Acyclovir cream 5 % is a topical antiviral medication used to treat viral skin infections. It belongs to the class of nucleoside analogues that inhibit viral dna synthesis. The cream is formulated to deliver acyclovir directly to the site of infection on the skin. The active ingredient works by phosphorylating the drug inside infected cells to form acyclovir triphosphate. This metabolite competes with deoxyguanosine triphosphate and terminates the growing viral dna chain. As a result viral replication is halted and the spread of infected cells is limited. The application provides local therapeutic effect without systemic exposure. Through selective activation in infected cells the drug achieves topical antiviral activity.

A common reaction to acyclovir cream 5 percent is mild skin irritation at the application site. Some users report a temporary burning or stinging sensation during or after use. Redness and itching are also frequently observed but generally fade with continued application. Dryness or slight peeling of the skin may occur alongside these effects. Occasional swelling or a mild rash can appear in sensitive individuals. These reactions are typically short lived and do not indicate a serious problem. Patients should monitor the skin for worsening symptoms but need not seek professional guidance for mild occurrences.

Acyclovir cream 5 % may cause a mild burning or stinging sensation when first applied. Some users notice temporary redness or irritation at the site of application. Itching or a dry, flaky feeling can also occur in occasional cases. These reactions are usually mild and tend to improve with continued use. Less frequently, a slight rash or swelling may develop, which generally resolves without treatment. Most side effects are localized and do not require medical intervention unless they become severe.