Has anyone experienced macrocytosis while taking valcyclovir for suppressive therapy? I have, now twice. This was confirmed as a side effect by my doctor and apparently increases with age (I am 50). The first time, after taking the medication for about a year, the numbers righted themselves after a few months off of the medication, but frequent outbreaks started again, so I resumed the medication. Now, about six months later, I have developed macrocytosis again and, once again, am off the medication. If anyone has any experience with this, I would appreciate the feedback, as well as knowing if switching to acyclovir was safer/produced a better result?