Effect of Namenda on Short Term Memory and Attention in Patients With Mild to Moderate Traumatic Brain Injury

After randomization of the subject, subjects will be titrated up to 20 mg of memantine or placebo per day. Memantine and placebo are provided as 5 mg tablets. Subjects will be started at 5 mg per day. The dose will be increased by 5 mg increments to 10 mg per day (5 mg twice per day), 15 mg per day (5 mg and 10 mg as separate doses) and 20 mg per day (10 mg twice per day). The minimum interval between dose increases will be one week. Subjects will take memantine or placebo for 12 weeks during each part of the crossover study. Subjects are randomized to begin either memantine or placebo in each arm of the study.

After randomization of the subject, subjects will be titrated up to 20 mg of memantine or placebo per day. Memantine and placebo are provided as 5 mg tablets. Subjects will be started at 5 mg per day. The dose will be increased by 5 mg increments to 10 mg per day (5 mg twice per day), 15 mg per day (5 mg and 10 mg as separate doses) and 20 mg per day (10 mg twice per day). The minimum interval between dose increases will be one week. Subjects will take memantine or placebo for 12 weeks during each part of the crossover study. Subjects are randomized to begin either memantine or placebo in each arm of the study.