Understanding Aciclovir Side Effects and Safety
Common Side Effects (Affect up to 1 in 10 people)
The most frequently reported side effects when taking aciclovir tablets include headache, dizziness, nausea, vomiting, diarrhoea, and stomach pain. These effects are usually mild and often improve as your body adjusts to the medication. Skin reactions such as rash or itching may also occur. If these symptoms persist or worsen, consult your pharmacist or GP for guidance.
Uncommon Side Effects (Affect up to 1 in 100 people)
Less common reactions include fatigue, confusion, tremor, shortness of breath, and sensitivity to light. Some patients experience hair loss or changes in blood test results affecting liver or kidney function. Visual disturbances and sleep problems have also been reported. These effects typically resolve once treatment is completed, but monitoring is important during longer courses.
Serious Side Effects Requiring Immediate Attention
Seek urgent medical help if you experience severe allergic reactions including difficulty breathing, swelling of face, lips, tongue, or throat, or widespread skin rash. Signs of kidney problems such as reduced urination, blood in urine, or severe back pain need immediate assessment. Neurological symptoms like seizures, severe confusion, or hallucinations are rare but serious. Blood disorders may cause unusual bruising, bleeding, or persistent infections.
Managing Side Effects Effectively
Taking aciclovir tablets with food can reduce stomach upset and nausea. Maintaining good hydration is crucial, especially during longer treatment courses, as this helps protect kidney function. If you experience dizziness, avoid driving or operating machinery until symptoms resolve. For cold sore treatment, EverydayMeds offers various aciclovir formulations including 400mg tablets and topical preparations to suit different needs and tolerance levels.
When to Contact Healthcare Professionals
Contact your prescriber if side effects interfere with daily activities or persist beyond expected timeframes. Regular monitoring may be recommended for patients taking high doses or extended courses. Alternative treatments like valaciclovir tablets may be considered if aciclovir causes problematic side effects. EverydayMeds pharmacists can provide guidance on managing minor side effects and when to seek further medical advice for your antiviral treatment.
