From: Valaciclovir to prevent Cytomegalovirus mediated adverse modulation of the immune system in ANCA-associated vasculitis (CANVAS): study protocol for a randomised controlled trial
Creatinine clearance (CrCl ml/min)a
Valaciclovir dose
>75
2 g four times a day
51–75
1.5 g four times a day
26–50
1.5 g three times a day
10–25
1.5 g two times a day