I USED HALO 3 WEEKS BEFORE MY SHOW. THE NOTICE THAT I SAW WAS I WAS HARD AS A FUCKING ROCK. I DIDNT HAVE AN ATITUDE PROBLEM. ONCE IN A WHILE I WOULD GET MOODY BUT THAT COULD BE FROM THE DIETING AND ALL THE OTHER SHIT I WAS ON. BUT I WOULDNT USE HALOS NO LONGER THAN 6 WEEKS. AND KEEP IT AROUND 20-25MGS A DAY.