De hyppigste bivirkninger ved brug af Viread (som ses hos flere end 1 ud af 10 patienter) er kvalme, opkastning, diarré, svimmelhed og hypofosfatæmi (for lavt indhold af fosfat i blodet).
The most common side effects when taking Viread (seen in more than 1 patient in 10) are nausea (feeling sick), vomiting, diarrhoea, dizziness, and hypophosphataemia (low levels of phosphate in the blood).