Griseofulvin starts working immediately by inhibiting fungal growth, but visible improvements typically take several days to weeks to appear. For skin and hair infections, it may take up to a few weeks to notice a difference, while nail infections can take up to a year to clear completely. The duration of treatment varies: 2-4 weeks for skin infections, 4-6 weeks for scalp infections, 3-4 months for fingernail infections, and at least 6 months for toenail infections. It is essential to complete the full course prescribed by the doctor to prevent recurrence of the infection.
