What is the recommended dosage of polytar liquid ?

According to WebMD, the recommended dosage of polytar liquid is usually enough to create a good lather, used one or two times per week. The correct dosage is based on the severity of the condition being treated and the brand being used.

Polytar liquid is a type of shampoo used to treat scalp conditions. Polytar shampoo should be worked into a lather and massaged into the hair and scalp, where it should be allowed to sit for 15 minutes before rinsing and repeating the procedure. Polytar liquid works by helping the scalp slough off dead skin cells and by inhibiting the growth of new ones, according to NHS Choices. It is used to treat dandruff and itchy, scaly scalp conditions like psoriasis and seborrheic dermatitis, and rashes like eczema.