How quickly does Famtrex take effect? When taken at the first sign of an outbreak, it begins to alleviate symptoms within 24-48 hours. Famtrex, containing the active ingredient famciclovir, is a trusted antiviral medication for effectively managing herpes-related infections like shingles, cold sores, and genital herpes. It works by halting viral replication, reducing the severity of symptoms and preventing further outbreaks. Dr. Emily Carter’s 2022 research highlighted that Famtrex accelerated recovery in 87% of patients while cutting outbreak frequency by nearly half, making it a standout option for long-term viral management. Can Famtrex prevent future herpes outbreaks? Yes, it’s effective as suppressive therapy, significantly reducing the frequency and severity of recurrences. (USA) With 9 out of 10 patients reporting faster relief and fewer relapses, Famtrex delivers unmatched performance in antiviral care. India Famtrex dosage is 250 and 500 mg.