Zovirax Suspension is used to treat viral infections. It contains Aciclovir, which prevents the multiplication of viruses, resulting in decreased viral overload. In some cases, you may experience side effects such as headaches, dizziness, nausea or vomiting, diarrhoea, rash, and skin sensitivity to sunlight. Before starting Zovirax Suspension , inform your doctor if you are pregnant, breastfeeding, taking any other medicines or have pre-existing medical conditions.