Welcome to HCM,
As he has alopecia
, along with medicines food habit is also important.Ask him to avoid too much salt in food, pickles, Chinese food,spicy and junck food.Take plenty of fruits,vegetables,milk,butter milk.
Ask him to start Makardhwaj vati an ayurvedic medicine 1 tab bd empty stomuch. Apply oil wich contains jaswand,maka,awala.Take triphala
vati 2 tab at bed time.
If possible to do body purification i.e panchakarm-vaman.