What is the recommended dosing of Lysine (L-lysine) for the treatment of herpes simplex virus (HSV) infections?

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Last updated: May 3, 2025View editorial policy

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From the Guidelines

Lysine supplementation is not recommended for herpes treatment or prevention based on the provided evidence, which focuses on anti-HSV therapy such as acyclovir, valacyclovir, or famciclovir for suppressive therapy. The most recent and highest quality study, 1, discusses the diagnosis and management of genital herpes, emphasizing the importance of practical treatment regimens for first clinical episode, episodic therapy, and suppressive therapy, but does not mention lysine as a treatment option.

Key Considerations

  • The study 1 from 2009 recommends daily anti-HSV therapy for persons with frequent or severe recurrences of genital herpes, using medications like acyclovir, valacyclovir, or famciclovir, but does not address lysine supplementation.
  • The more recent study 1 from 2022 prioritizes dosing strategies that are most feasible for patient adherence for anti-herpesvirus medications, without mentioning lysine.
  • Given the lack of evidence supporting lysine supplementation for herpes treatment or prevention in the provided studies, the focus should be on evidence-based treatments like anti-HSV therapy.

Clinical Implications

  • Patients with herpes should consult with a healthcare provider to discuss suppressive therapy options using anti-HSV medications.
  • The provider can help determine the most appropriate treatment regimen based on the patient's specific needs and medical history.
  • It is crucial to prioritize treatments with strong evidence backing, such as anti-HSV therapy, over supplements like lysine that are not supported by the provided evidence.

From the Research

Lysine Dosing for Herpes

There are no research papers to assist in answering this question as the provided studies do not mention lysine dosing for herpes.

Alternative Treatments

  • The studies provided discuss the efficacy and safety of antiviral agents such as valaciclovir, acyclovir, and famciclovir in the treatment of herpes zoster and herpes simplex infections 2, 3, 4, 5, 6.
  • Valaciclovir has been shown to be effective in reducing the duration of zoster-associated pain and is a useful treatment option for patients with herpes zoster or genital herpes 2, 4.
  • Acyclovir and valacyclovir have been found to be effective in preventing recurrent herpes labialis when taken prior to the appearance of any symptoms or exposure to triggers 5.
  • The choice of antiviral agent and dosing regimen depends on various factors, including the type of herpes infection, patient preference, and clinical characteristics 6.

Dosage Information

  • Valaciclovir dosages of 1000mg three times daily for 7 days have been used in the treatment of herpes zoster 2.
  • Acyclovir dosages of 800mg five times daily for 7 days have been used in the treatment of herpes zoster 2.
  • Valaciclovir dosages of 500-1000mg twice daily for 5-10 days have been used in the treatment of genital herpes 4.
  • Acyclovir dosages of 200mg five times a day for 5-10 days have been used in the treatment of genital herpes 4.

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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