How long does it take to treat with the antifungal medication?

The length of treatment depends on what type of fungal infection you have, how severe it is and if you have any other health problems - for example, problems with your immune system. Some courses of treatment can be as short as a few days; other courses can be a long as ten weeks (for example, fo ringworm infection of the scalp).
taken from : http://www.patient.co.uk