Understanding and Managing Aciclovir Side Effects
Common Side Effects of Cold Sore Tablets
Aciclovir tablets, the most commonly prescribed treatment for cold sores, are generally well-tolerated by most patients. However, some people may experience mild side effects including nausea, headache, diarrhoea, stomach pain, and dizziness. These effects typically occur in fewer than 1 in 10 people and often improve as your body adjusts to the medication.
Practical Management Strategies
To minimise digestive side effects, take your aciclovir tablets with food or milk. This can significantly reduce nausea and stomach discomfort. Staying well-hydrated is particularly important when taking antiviral medications, as adequate fluid intake supports kidney function and helps prevent potential kidney-related side effects. Aim to drink at least 2-3 litres of water daily during treatment.
When to Seek Medical Advice
While serious side effects are uncommon, contact your healthcare provider immediately if you experience signs of kidney problems such as reduced urination, swelling in hands or feet, or unusual tiredness. Severe skin reactions, difficulty breathing, or signs of liver problems including yellowing of skin or eyes also require urgent medical attention.
Treatment Options Available at EverydayMeds
EverydayMeds offers various cold sore treatments to suit different needs and tolerances. Aciclovir 400mg tablets remain the primary prescription treatment, with valaciclovir 500mg tablets available as an alternative for those who experience side effects or require less frequent dosing. Topical aciclovir cream provides localised treatment with minimal systemic absorption, potentially reducing the risk of oral medication side effects.
Optimising Your Treatment Experience
Starting treatment at the first sign of a cold sore outbreak can improve effectiveness and may reduce the duration of any side effects. Keep a treatment diary noting any side effects and their severity to discuss with your pharmacist or prescriber. This information helps tailor future treatment plans to your individual needs and tolerance levels.






