Halobetasol is not meant to be used on the scalp. Clobetasol is the preferred choice of topical medicine for conditions such as scalp psoriasis.
The dose and time of clobetasol depend upon the condition and the severity of the scalp infection. Generally, it can be applied to the affected area of the skin twice a day. Follow your doctor’s advice or the directions mentioned on the label for the best results.