Herpes is treated with antiviral medications that shorten outbreaks, reduce their frequency, and lower the risk of transmitting the virus to a partner. There is no cure that eliminates the virus from your body, but the right treatment approach can make outbreaks shorter, less painful, and far less frequent.
How Antiviral Medications Work
Three prescription antivirals form the backbone of herpes treatment. All three work by the same basic principle: they get absorbed preferentially into virus-infected cells, where they block the machinery the virus uses to copy its DNA. Because the drugs concentrate inside infected cells at 40 to 100 times the level found in healthy cells, they attack the virus without doing much to the rest of your body.
Your doctor will typically prescribe one of these depending on convenience, cost, and how your body responds. The newer options are essentially improved versions of the original, designed to be taken less often because they’re absorbed more efficiently.
Episodic vs. Suppressive Therapy
There are two main strategies for using antivirals, and which one you choose depends on how often you get outbreaks and how much the virus affects your daily life.
Episodic therapy means taking medication only when an outbreak starts. You keep a prescription on hand and begin taking it at the first sign of tingling, burning, or sores. The key is speed. Starting within the first 24 hours makes a real difference in how quickly lesions heal. With treatment, a genital herpes outbreak typically heals in about 4 days compared to 6 days without medication. For cold sores, antiviral treatment shaves roughly 1 to 1.5 days off healing time.
Suppressive therapy means taking a low dose of an antiviral every day, whether or not you have symptoms. This approach reduces outbreak frequency by 70% to 80% in people who get frequent recurrences. Daily suppressive therapy also lowers the rate of transmitting HSV-2 to an uninfected sexual partner, which makes it a common choice for people in relationships where one partner has herpes and the other doesn’t.
Most people who get fewer than four to six outbreaks per year do fine with episodic therapy. If outbreaks are more frequent, or if reducing transmission risk is a priority, daily suppression is the stronger option.
How Much Faster Antivirals Heal Outbreaks
Clinical trials have measured the healing timeline with precision. For recurrent genital herpes, median healing times with various antiviral regimens range from about 3.8 to 5.7 days, compared to 4.7 to 7.2 days on placebo. That translates to roughly 1.5 to 2 fewer days of active sores.
For oral herpes (cold sores), a single high-dose day of antivirals can reduce the time to crust loss from about 5 to 6 days down to 4 to 5 days. Short-course and single-day regimens have proven roughly as effective as the older multi-day protocols, which means you don’t necessarily need to take pills for five straight days to get a meaningful benefit. Your doctor can help you choose between a short burst at the first sign of symptoms or a longer standard course.
Topical Treatments for Cold Sores
Prescription topical creams containing the antiviral penciclovir are the most effective option you can apply directly to a cold sore. In head-to-head comparisons, penciclovir cream reduced lesion area by 38% and viral levels by 88%, outperforming the prescription cream version of the older antiviral (28% area reduction, 77% viral reduction).
The over-the-counter option, docosanol cream (sold as Abreva), works through a different mechanism than prescription antivirals. In laboratory models designed to test antiviral activity, docosanol did not show a statistically significant difference from placebo. That said, it may work through other pathways not captured in those tests, and many people report subjective benefit. If you want the strongest topical option, a prescription cream will outperform what’s available over the counter.
Managing Pain During an Outbreak
While antivirals fight the virus itself, you’ll likely want relief from the pain, itching, and burning that come with active sores. Cool compresses applied to the area can reduce swelling and soothe irritation. Wearing loose, breathable cotton underwear helps prevent friction against genital sores.
Over-the-counter pain relievers like ibuprofen or acetaminophen help with general discomfort. For more targeted relief, topical numbing agents containing lidocaine (typically in a 5% gel formulation) can be applied directly to painful areas. Keeping sores clean and dry speeds healing and reduces the risk of secondary bacterial infection. Urinating in a warm bath or pouring water over the area while urinating can help if sores make it painful to use the bathroom.
Does Lysine Actually Help?
Lysine is the most popular supplement people try for herpes, and the evidence is mixed but worth understanding. At doses under 1 gram per day, lysine does not appear to reduce outbreak frequency or speed healing in a meaningful way. At higher doses, results look more promising. In one trial, 3 grams daily led to 74% of participants reporting milder symptoms, compared to 28% on placebo, with a statistically significant reduction in recurrences. Another study found that 1,248 mg daily cut recurrences roughly in half (0.89 per year vs. 1.56), while 624 mg daily was no better than placebo.
The pattern across trials suggests a dose-dependent effect: you likely need at least 1 gram per day, and possibly 3 grams, to see a real difference. Some research also links effectiveness to achieving a certain blood level of lysine rather than the dose alone. Lysine is not a substitute for antiviral medication, but it may offer a modest additional benefit for people looking to reduce recurrences, particularly at higher doses combined with a diet lower in arginine (found in nuts, chocolate, and seeds).
Reducing Transmission Risk
Herpes can spread even when no visible sores are present, through a process called asymptomatic shedding. This is when the virus becomes active on the skin surface without triggering noticeable symptoms. Combining strategies gives you the best protection for a partner.
- Daily suppressive therapy reduces both outbreak frequency and the rate of viral shedding between outbreaks, lowering the chance of passing HSV-2 to an uninfected partner.
- Condoms provide a physical barrier but don’t cover all potentially affected skin, so they reduce but don’t eliminate risk.
- Avoiding sexual contact during outbreaks is important because viral levels are highest when sores are active, from the first tingling through complete healing.
Using all three strategies together provides the greatest risk reduction.
When Standard Treatment Doesn’t Work
Antiviral resistance is rare in otherwise healthy people, occurring in less than 1% of cases regardless of how long someone has been on treatment. In people with weakened immune systems, particularly those who have received stem cell transplants, resistance rates are significantly higher.
If sores don’t respond to standard antivirals, alternative medications that work through different mechanisms are available. A newer class of drugs called helicase-primase inhibitors is currently in advanced clinical trials and shows promise for treating resistant infections. In a Phase 2 trial, 93% of immunocompromised patients with resistant herpes healed on the investigational drug, compared to 57% on the current alternative, with far fewer side effects leading to discontinuation (4% vs. 43%). This class of medication could eventually expand treatment options for the broader population as well.
Living With Herpes Long Term
For most people, herpes becomes less of a problem over time. Outbreaks tend to become less frequent and less severe in the years following the initial infection, particularly with HSV-2. Many people eventually stop having noticeable outbreaks altogether, even without suppressive therapy.
You can reassess your treatment approach periodically. Someone who starts on daily suppressive therapy might try stepping down to episodic treatment after a year or two to see whether outbreaks have naturally become infrequent. The virus remains in the body permanently, but the practical impact on your life typically diminishes, and effective treatment is available whenever you need it.