It may take 3 to 5 minutes. Couple of drops to cover the effected areas an approximately one inches around it. One bottle lasts for about one month. It is inexpensive in comparison to other similar products in the market . It does not fall in category of shampoos.
Price varies due to promotional programs at times.
Compare prices when you feel prepared for it as prices may vary due to promotions. I am losing my hair. I think the cause is heredity. It works in cases when hairs are there and start falling off as in your case. No side effects have come to knowledge so far.