Valtrex 500mg is a prescription medication containing valaciclovir as the active ingredient. Each pack contains 42 tablets, with each tablet containing 500mg of valaciclovir. This medication is manufactured by GlaxoSmithKline (GSK). The product comes in a blue box packaging clearly labeled with the Valtrex brand name and GSK logo. Each tablet contains 500mg of the active ingredient valaciclovir. The package contains 42 tablets in total.