The common formulation of famciclovir is tablets, with an approximate price period of $5.83 – $39.00. Famciclovir tablets are antiviral drugs used in the treatment of primary genital herpes and shingles. The common specification of this product is 0.125g*6 tablets/box, due to the different drug manufacturers, distributors, specifications, etc., the price is not uniform, the approximate price range is in the range of 5.83 yuan -39.00 yuan/box, the specific to the local pharmacy or health care institutions prices prevail. Adverse reactions are commonly headache and nausea, dizziness, drowsiness, dyspepsia, vomiting, constipation, flatulence and so on. Contraindication: prohibited for those who are allergic to it. Precautions: Sexual contact is prohibited during use for the treatment of genital herpes. If there is a need for medication for this product, it should be used under the guidance of a physician, and should not be used on its own, so as not to cause adverse consequences.