I bought it at GNC. Melatonin 3 (3mg) and Melatonin 5 (5 mg)...I gave one of each daily until the spots vanished and the hairs grew back. Than I gave it twice a week and now I stopped. I read it can come back, so if it comes back or better said the hair will be gone again...I will start again. This really worked in a short time period and I didn't spend any money at the vet...just approx. $ 15.- at GNC!
It is funny but on the label it is saying: supports restful sleep....and that for an English bulldog...