Gray nail oral medication generally choose antifungal drugs, antifungal drugs on the liver whether there is damage to the patient’s liver function and whether the reasonable use of drugs to see. Gray nail belongs to the dermatology of common diseases, is a fungal infection caused by the typical symptoms of the patient’s nails will appear stratification, breakage, nail peeling, the color of gray, gray, yellow, thickening, and so on, and gray nails are contagious, serious cases will spread to the whole fingernail or toenail. Generally, gray nails can be treated with topical medication, and oral medication is needed if necessary. Commonly used medications include itraconazole capsules, terbinafine tablets, and other antifungal medications. These drugs have less impact on patients with normal liver function, and regular monitoring of liver function in accordance with the doctor’s instructions can to a certain extent avoid or reduce the damage to liver function, and the symptoms need to stop in time after the relief of the drug. Due to the oral medication on the liver may produce damage, it is recommended that patients strictly comply with the doctor’s instructions to use medication, not to take medication on their own, so as to avoid the serious consequences of non-standardized use of medication.