Which is better for treating gray nails, itraconazole or terbinafine?

Gray nails generally refers to onychomycosis, there is no itraconazole and terbinafine treatment of onychomycosis which is better, its effect can not be generalized, because both drugs belong to the antifungal drugs, the onychomycosis of the nails have a therapeutic effect.
Ringworm of the nails is mainly due to the nails are infected by red trichophyton, bearded trichophyton and other dermatophytes, resulting in the destruction of the nail plate and the onset of the disease. Itraconazole and terbinafine are both antifungal drugs. They are mainly used for the treatment of ringworm, tinea cruris, lichen planus, and both have therapeutic effects on onychomycosis.
Itraconazole common gastrointestinal adverse reactions, such as anorexia, nausea, abdominal pain, constipation, etc.; Terbinafine common adverse reactions include liver toxicity, taste and smell, hypersensitivity reactions.
Itraconazole and terbinafine need to be used under the guidance of a doctor when treating gray nails, not blindly self-medication.