Can you take fosfomycin 3g every 72 hours? Home › Forums › Male Health › Can you take fosfomycin 3g every 72 hours? Tagged: fosfomycin 3gm sachet This topic has 0 replies, 1 voice, and was last updated 2 years, 3 months ago by davidbrown. You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In