After reading all the positive comments about Spike, I decided to purchase a pack to help me with my workouts at the gym.
I started taking the standard dose of one tablet per day first thing in the morning on an empty stomach and then waited for the increased energy and mental focus. I found I had no extra energy and no increased mental focus. I decided to take 2 tablets first thing on an empty stomach and again, felt no increased energy or mental focus. I repeated taking 2 spike tablets for the rest of the week.
I can only assume that I have a high tolerance to stimulants and Spike will not work for me.