How long before I notice the effects of creatine?

This varies and there is no definite answer. Due to the cell volumisation effects, you should notice an increase in weight during or soon after the first week if you opt to load. You should also start to notice a fuller feel to your muscles, more energy in the gym and heavier lifts with 1-2 weeks. Most size and strength gains from creatine are during its first month of use (Kreider; et al 1995).