MHRA-Approved Cold Sore Tablet Dosage Strengths
Standard Aciclovir Tablet Strengths
Aciclovir tablets are available in three primary strengths: 200mg, 400mg, and 400mg. For cold sores, the most commonly prescribed strength is 400mg, taken five times daily for five days. The 200mg tablets require more frequent dosing - typically one tablet five times daily. Higher strength 400mg tablets are usually reserved for other herpes conditions rather than cold sores. EverydayMeds stocks aciclovir 400mg tablets, which provide the optimal balance between effectiveness and dosing convenience.
Alternative Antiviral Dosage Options
Valaciclovir offers a more convenient dosing schedule with 500mg tablets taken twice daily for cold sores. This reduces the dosing frequency compared to aciclovir whilst maintaining similar effectiveness. Famciclovir is another option, though less commonly prescribed for cold sores in the UK. The choice between different antivirals may depend on individual response, tolerability, and dosing preferences discussed with your healthcare provider.
Early Treatment Dosing Strategies
For maximum effectiveness, antiviral treatment should begin at the earliest sign of a cold sore outbreak - ideally during the tingling or prodromal phase. Early intervention with appropriate dosing may help reduce the severity and duration of symptoms. Standard episodic treatment typically involves a 5-day course, though some patients may benefit from shorter 1-3 day courses with higher doses when treatment is initiated very early.
Suppressive Therapy Considerations
Patients experiencing frequent cold sore outbreaks (6 or more per year) might be candidates for suppressive therapy. This involves taking lower daily doses of antiviral medication to prevent outbreaks. Suppressive dosing typically uses aciclovir 400mg twice daily or valaciclovir 500mg once daily. Such treatment requires ongoing medical supervision to assess effectiveness and monitor for any adverse effects over extended periods.
