Will taking mri No2 with rpm and drive diminish any effects? Also about how long after the dosages do people generally feel these products? It seems that when I take all 3 of these products 30minutes before a meal or snack it won;t increase my performance for about another 2.5-3 hrs. I generally use these supplements for sport and only take 1rpm and 1drive preworkout. I weigh 165 and cannot be on an empty stomach for training.