I have been getting valacyclovir hcl 500mg which is a generic of valtrex, its a blue tablet with a v.5 on one side and the actavis imprint on the other. It has worked just fine, I just picked up my refill and it's a white tablet with m122. I've never taken this brand before nor have I seen it. I work as a pharmacy tech but stay loyal to my community pharmacy. I assume my community pharmacy got this brand for a cheaper cost but will it be just as effective as the actavis brand? I take 1 tablet daily to prevent cold sores and I'm about to take a trip and I don't want any surprises.