Danfree 2 percent Shampoo is an antifungal shampoo that is used to treat skin fungal infections. It works by eradicating the infection-causing fungus. It kills fungi by damaging the cell membrane of the fungus. Danfree 2 percent Shampoo should be used according to your doctor's instructions for dosage and duration. To obtain the best benefit from this medicine, it should be used on a regular basis. Do not use more than you require; doing so will not improve your condition and may even worsen the adverse effects. Use it just as directed by your doctor, and notify him or her if your condition does not improve after 2 to 4 weeks of treatment. Make sure you don't keep it on for longer than 5 minutes.