Terbinafine tablets are commonly used antifungal drugs in clinical practice, the dose is usually 0.25g per day, so the maximum dose should not exceed 0.25g per day. Terbinafine tablets its active ingredient is terbinafine, this drug by interfering with the early biosynthesis of fungal sterols, inhibit the fungal ergospiralene cyclooxygenase, so as to achieve the role of killing or inhibiting the fungus, clinically used in tinea capitis, tinea corporis, mycosis fungoides and other fungal infectious diseases, for the general adult, the maximum dose of 0.25g per day. It should also be noted that for younger patients, the dose of the drug should be adjusted downward appropriately, because the product is metabolized by the liver and kidneys out of the body, so the combination of patients with impaired hepatic and renal function should also reduce the dose of the drug. The drug may cause gastrointestinal discomfort such as flatulence, loss of appetite, or skin discomfort such as itching and urticaria; it should also be noted that the product may damage the liver and kidney function, so the drug should pay attention to the review of liver and kidney function, the product for pregnant women’s clinical use of the drug experience is relatively small, so pregnant women should be used with caution. For patients who need to use terbinafine tablets, it is recommended to go to a regular hospital, under the guidance of the doctor to take medication, do not blindly use drugs.