IF this is happening most every time you get your injections, I would increase your suppressive dose of acyclovir
to 3-4 times per day vs
two for about 5 days starting on the day of your injection. See how that works. And don't just put them together but rather spread them out over the course of the five days. Do you see what I mean? You might want to run this by your health care provider, of course, but I think that might help.