Terbinafine is an acrylamide antifungal medication, if Terbinafine causes muscle pain, the medication should be stopped immediately and prompt medical attention is recommended. Terbinafine is the most commonly used antifungal drug for the treatment of onychomycosis, tinea cruris, tinea pedis and ringworm caused by dermatophytes. Common adverse reactions to terbinafine are generally mild, mainly gastrointestinal reactions, but also muscle pain, skin itching, hives, rash, and liver function impairment. If terbinafine causes muscle pain, it is recommended to stop the medication immediately and seek prompt medical attention. Terbinafine needs to be used under the guidance of a doctor or pharmacist, patients using Terbinafine, should follow the doctor’s instructions, closely observe their own situation, once a serious adverse reaction, it is recommended to consult a doctor in a timely manner, follow the doctor’s instructions for treatment.