Does anyone know if long-term use of acyclovir kills off the beneficial intestinal bacteria like antibiotics do? I have not found a pharmacist who knows for certain, but mine thinks it will not kill beneficial bacteria because acyclovir is an antiviral, not an antibiotic. I take 800 mg acyclovir tablets 4x per day. I am now taking Just Thrive Probiotic and am on my 3rd month of that. Previous probiotics were refrigerated brands. Any feedback from personal experience would be greatly appreciated! Thank you in advance.