Smeleanor

Hello, I have been taking 500mg acyclovir to prevent outbreaks for over seven years. Recently, every time I take it I have the most extreme fatigue I’ve ever experienced. I can’t get out of bed, I can barely open my eyes. Has this happened to anyone else on this drug before? It’s affecting my quality of life to the point that I can no longer take it and just have to deal with outbreaks. This has been going on for the last six months. Thanks in advance for any answers or advice