Keshboost-AD Shampoo with Conditioner should be used exactly as advised by your doctor or according to the instructions on the product label. For seborrhoeic dermatitis or dandruff caused by a fungal infection, it is commonly used 2 to 3 times a week for the first 2 to 4 weeks. Once the condition improves, using it once every 1 to 2 weeks may help prevent the problem from returning, if recommended by a healthcare professional. Wet your hair and scalp, apply the shampoo, gently massage it into the scalp, and leave it on for 3 to 5 minutes before rinsing thoroughly. Avoid getting the shampoo into your eyes, nose, or mouth. If your symptoms do not improve after several weeks of use or keep returning, please consult your doctor, as you may need further evaluation or a different treatment.