To see if medication will help your child, your doctor may offer you a placebo trial. A placebo trial usually takes three weeks. During one week, your child will take a low dose of the medicine. On another, s/he will take a higher dose of the medicine. During another, your child will take sugar pills. During the trial, you will not know which week is which. Each week your doctor will ask for your feedback and your child's teachers' feedback. From this trial, you will be able to know for sure whether the medicine actually helps your child. If it does, the placebo trial will also help you determine the best dosage for your child.