Cold sore treatments available after consultation:

Frequently Asked Questions

What is the best cold sore treatment?

The best cold sore treatment is usually an antiviral medication such as Aciclovir, available as tablets or cream, started as early as possible and ideally at the first tingling sensation before a blister appears. Aciclovir tablets for cold sores work systemically, while the cream targets the affected area directly.

What is the difference between a cold sore and a fever blister?

There is no real difference between a cold sore and a fever blister. The terms are commonly used interchangeably to describe small, fluid-filled blisters that usually appear on or around the lips and are caused by the herpes simplex virus (HSV-1). They may begin with tingling or burning before blisters develop and are contagious while they are healing.

Are Aciclovir tablets for cold sores effective?

Yes. Aciclovir tablets are a well-established cold sore treatment that works by stopping the herpes simplex virus from multiplying, helping to shorten the duration of an outbreak and ease symptoms when started promptly.

What's the difference between cold sore tablets and cream?

Cold sore tablets work throughout the body to fight the virus internally, which can be more effective for frequent or severe outbreaks, while cream is applied directly to the cold sore to target the local area. Some people use both together for more effective relief and your SwiftDoctor clinician can advise on the best combination for you.

How quickly does cold sore medication work?

When started early, at the first tingling or itching sensation, cold sore medication can help reduce how long an outbreak lasts and ease discomfort within a day or two. Starting treatment after the blister has already formed is still worthwhile but tends to be less effective than early treatment.

How can I prevent cold sores from recurring?

Common triggers include stress, illness, sun exposure, and a weakened immune system, so managing these where possible can help reduce recurrence. If you get frequent cold sores, a SwiftDoctor clinician can advise on preventative options and keeping cold sore treatment on hand for the earliest signs of a flare-up.

How it works

Throughout your treatment, the SwiftDoctor clinical team is available to support you, answer questions, and review your progress.

  • Step 1

    Create your account

    Create your free account to access our GP-led healthcare services. Your details are securely stored so you can manage prescriptions, place future orders more quickly, and access ongoing clinical support whenever you need it.

  • Step 2

    Complete your health questionnaire online in around five minutes

    Answer a few straightforward questions about your health history, lifestyle and goals from the comfort of your own home. Add your chosen medication to your basket and complete your payment. Most patients finish in around five minutes.

  • Step 3

    A UK-registered clinician reviews your responses

    A UK-registered clinician carefully reviews your assessment to ensure the treatment is safe and appropriate for you. Your health is never treated as a formality.

  • Step 4

    If eligible, your prescription is issued

    If you meet the clinical criteria, your prescription is approved and prepared without delay. No waiting rooms, no repeat appointments — just a straightforward, clinician-led process.

  • Step 5

    Your medication is dispatched in discreet, temperature-controlled packaging

    Your medication is packed securely in plain, temperature-controlled packaging and delivered directly to your chosen address, protecting both your privacy and the integrity of your treatment.

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