Understanding Aciclovir Side Effects and Management
Common Side Effects of Aciclovir Tablets
The majority of patients taking aciclovir tablets experience few or no side effects. When side effects do occur, they are typically mild and temporary. Common side effects, affecting up to 1 in 10 people, include headache, nausea, vomiting, diarrhoea, and abdominal pain. These effects often improve as your body adjusts to the medication and rarely require treatment discontinuation.
Headaches are amongst the most frequently reported side effects, usually mild to moderate in intensity. If headaches persist or worsen, paracetamol or ibuprofen may provide relief, though you should consult your pharmacist or GP if symptoms concern you.
Uncommon and Rare Side Effects
Uncommon side effects, affecting 1 in 100 to 1 in 1,000 people, may include dizziness, fatigue, skin rash, and increased sensitivity to sunlight. Some patients report feeling generally unwell or experiencing changes in liver function tests, though these typically normalise after treatment completion.
Rare side effects, occurring in fewer than 1 in 1,000 people, include confusion, hallucinations, seizures, and kidney problems. Whilst serious, these effects are more likely with high doses or in patients with existing kidney problems. Blood disorders affecting white blood cells or platelets are extremely rare but require immediate medical attention if suspected.
Kidney-Related Considerations
Aciclovir is eliminated through the kidneys, making adequate hydration important during treatment. Dehydration may increase the risk of kidney-related side effects, particularly with higher doses. Symptoms such as reduced urination, swelling, or unusual fatigue should prompt immediate medical consultation. Patients with existing kidney problems may require dose adjustments and closer monitoring.
Managing Side Effects Effectively
Most aciclovir side effects can be managed with simple measures. Taking tablets with food may reduce stomach upset, whilst maintaining good fluid intake supports kidney function. If you experience nausea, eating smaller, more frequent meals and avoiding spicy or fatty foods may help. For skin sensitivity, using high-factor sunscreen and avoiding prolonged sun exposure is advisable.
EverydayMeds provides aciclovir 400mg tablets through our online consultation service, with experienced pharmacists available to discuss any concerns about side effects. Our clinical team can advise on symptom management and when to seek further medical attention.
When to Seek Medical Advice
Whilst most side effects are mild and self-limiting, certain symptoms require prompt medical attention. Contact your GP or pharmacist if you experience severe headaches, confusion, unusual bruising or bleeding, significant reduction in urination, or any symptoms that worry you. Severe allergic reactions are rare but constitute a medical emergency requiring immediate treatment.
If side effects significantly impact your daily activities or persist beyond the treatment period, professional medical advice ensures appropriate management. Never stop taking aciclovir abruptly without consulting a healthcare professional, as this may affect treatment effectiveness.
