Herpex 800 DT Tablet contains Acyclovir 800 mg, an antiviral agent indicated for the treatment of herpes simplex virus infections, including genital herpes, herpes labialis (cold sores), and herpes zoster (shingles). Acyclovir is a synthetic nucleoside analogue that inhibits viral DNA polymerase, thereby preventing viral replication. Herpex 800 DT is formulated as a dispersible tablet, allowing for rapid dissolution and ease of administration, particularly beneficial for patients with swallowing difficulties. The medication is typically prescribed to reduce the severity and duration of acute herpes virus outbreaks and to decrease the frequency of recurrent episodes. It is also used prophylactically in immunocompromised patients to prevent herpes virus infections. The recommended dosage and duration of therapy depend on the indication, patient age, renal function, and severity of infection. Common adverse effects may include headache, nausea, diarrhea, and abdominal discomfort, though the drug is generally well tolerated. Caution is advised in patients with renal impairment, and adequate hydration should be maintained to prevent renal toxicity. Herpex 800 DT should be used under medical supervision, and patients are advised to complete the full course of therapy to ensure optimal efficacy and reduce the risk of viral resistance.