What viruses does acyclovir tablets treat?

Acyclovir tablets are white, unremarkable-looking tablets classified as antiviral agents. Acyclovir belongs to the class of purine nucleoside antiviral drugs and is commonly used to treat infections caused by herpes simplex virus (HSV), varicella-zoster virus (VZV), and cytomegalovirus (CMV) in vitro.

Which Viruses Does Acyclovir Treat?

1. Herpes Simplex Virus (HSV) Infection

Clinically, HSV infection is characterized by clusters of small, unilocular vesicles on the skin or mucosa—commonly appearing on the face or genitalia—and tends to recur frequently. Acyclovir tablets are indicated for both initial and recurrent episodes of genital herpes. For patients with frequent recurrences, oral acyclovir may be used prophylactically.

2. Varicella-Zoster Virus (VZV) Infection — Shingles

Shingles is an acute infectious dermatosis caused by VZV infection. In children lacking immunity to this virus, primary infection manifests as chickenpox. Some infected individuals become asymptomatic carriers without developing clinical disease. Acyclovir is indicated for the treatment of shingles in immunocompetent individuals and for mild cases in immunocompromised patients.

3. Chickenpox

Chickenpox is an acute infectious disease resulting from the primary infection with varicella-zoster virus. It exhibits high infectivity, predominantly affecting infants and young children. Clinical features include fever and widespread erythematous maculopapules, vesicles, and crusts. Acyclovir may be used to treat chickenpox in immunocompromised patients.

Precautions When Using Acyclovir Tablets

1. Patients allergic to acyclovir may also exhibit hypersensitivity to this product.

2. Use with caution in patients with dehydration or pre-existing hepatic or renal impairment.

3. Prolonged or repeated use of acyclovir in severely immunocompromised patients may lead to resistance development in HSV and VZV. If lesions in a patient with herpes simplex fail to improve following acyclovir therapy, susceptibility testing of the causative HSV strain should be performed.

4. Follow-up monitoring: Since patients with genital herpes have an increased risk of cervical cancer, annual gynecological examinations are recommended for early detection.

5. Initiate acyclovir therapy as early as possible upon onset of herpes symptoms and signs.

6. Food intake has minimal effect on plasma drug concentrations. However, adequate hydration should be maintained during treatment to prevent renal tubular precipitation of acyclovir.

The above provides an overview of the viral indications for acyclovir tablets. We hope this information is helpful to you.