Terbinafine hydrochloride solution is generally well absorbed, but the absorption of the drug is related to the dosage form of the drug, the route of administration, and the individual’s constitution. Terbinafine hydrochloride solution is a broad-spectrum antifungal drug, which can highly selectively inhibit the fungal squalene epoxidase and interfere with the early biosynthesis of fungal sterols, so as to achieve the purpose of inhibiting and killing fungi. Terbinafine hydrochloride solution is mainly used topically for the treatment of tinea cruris, tinea pedis, tinea cruris, tinea corporis, tinea pedis, etc. When used, take an appropriate amount of solution and apply it to the affected area and the surrounding skin. Usually the absorption of the drug is better, but keratinized skin lesions due to the thickening of the local stratum corneum of the lesion will have an impact on its transdermal absorption rate, such as keratinized tinea pedis. In addition, when fungal infections occur in the elderly, infants and young children, and skin breaks, their transdermal absorption rate is increased compared with that of normal adults due to the thinning or even absence of their skin. The drug may cause skin irritation such as burning sensation, or allergic reactions such as rash and itching during use. When the above symptoms occur, the drug should be stopped and washed immediately, and go to the hospital in time. It is prohibited for those who are allergic to the ingredients of the drug. Please follow the doctor’s instructions or use it under the guidance of a professional physician. It is recommended that patients with fungal infections go to a regular hospital in a timely manner and standardize the use of medication under the guidance of a doctor, and if you need to use terbinafine hydrochloride solution, you should strictly follow the doctor’s instructions, and do not use the drug on your own to cause serious adverse reactions.