Managing Cold Sore Treatment Side Effects

Cold sore medications like aciclovir can effectively reduce outbreak severity and duration, but may cause side effects in some patients. Understanding potential reactions and how to manage them helps ensure safe, effective treatment. Most side effects are mild and temporary, but knowing what to expect can improve your treatment experience. EverydayMeds provides comprehensive guidance alongside our range of cold sore treatments to support your recovery.

  • Common side effects include nausea, headache, and dizziness with oral aciclovir
  • Topical treatments may cause skin irritation or burning sensation at application site
  • Drinking plenty of water helps reduce risk of kidney-related side effects
  • Most reactions are mild and resolve once treatment is completed
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Available Treatments

Choose from a wide range of clinically-proven, safe, and effective treatments for Cold Sore.

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Aciclovir Tablets

From £12.99

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Aciclovir 5% Cream

From £8.99

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Valaciclovir

From £18.99

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Valtrex

From £34.99

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Complete Side Effects Management Guide

Common Side Effects of Aciclovir Tablets

Aciclovir 400mg tablets, available through EverydayMeds, may cause mild side effects in some patients. The most frequently reported reactions include nausea, headache, dizziness, and stomach upset. These effects typically occur within the first few days of treatment and often resolve as your body adjusts to the medication. Taking tablets with food can help reduce stomach irritation, whilst staying well-hydrated supports kidney function during treatment.

Topical Treatment Reactions

Aciclovir 5% cream may cause localised skin reactions including mild burning, stinging, or redness at the application site. These reactions are usually temporary and indicate the medication is working to target the virus. If irritation persists or worsens, discontinue use and consult your pharmacist. Some patients experience temporary skin dryness or flaking around the treated area, which typically resolves after completing the course.

Managing Valaciclovir Side Effects

Valaciclovir 500mg tablets, an alternative antiviral available at EverydayMeds, convert to aciclovir in the body but may cause slightly different side effect patterns. Headache and nausea remain common, but some patients report fatigue or mood changes. These effects are generally mild and temporary. The medication's improved absorption means lower doses are often effective, potentially reducing side effect frequency.

When to Seek Medical Advice

Whilst most side effects are manageable, certain symptoms require immediate medical attention. Severe allergic reactions including rash, swelling, or breathing difficulties need urgent care. Unusual bleeding, severe headache, or signs of kidney problems such as reduced urination or blood in urine should prompt medical consultation. Contact EverydayMeds pharmacists for guidance on managing mild side effects or determining when professional medical review is appropriate.

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