Drug

Dosage

Duration

Griseofulvin microsize (liquid 125 mg/5 mL)

20–25 mg/kg/d

≥6 wk; continue until clinically clear
FDA approved for children >2 y

Griseofulvin ultramicrosize (tablets of varying size)

15 mg/kg/d

≥6 wk; continue until clinically clear
FDA approved for children >2 y

Terbinafine tablets (250 mg)

4–6 mg/kg/d
10–20 kg: 62.5 mg
20–40 kg: 125 mg
>40 kg: 250 mg

Trichophyton tonsurans: 2–6 wk
Microsporum canis: 8–12 wk
FDA approved for children >4 y

Terbinafine granules (125 mg and 187.5 mg)

<25 kg: 125 mg 25–35 kg: 187.5 mg >35 kg: 250 mg

6-wk duration for all species
FDA approved for children ≥4 y

Fluconazole

6 mg/kg/d

3–6 wk
FDA approved for the treatment of oral candidiasis in children ≥6 mo but not approved for the treatment of tinea capitis