Efficacy and Safety of Ramelteon on Chronic Insomnia

"Randomized sequence over two consecutive nights for a total of five treatment periods to include the following:~Ramelteon 4 mg, tablets, orally over two nights~Ramelteon 8 mg, tablets, orally over two nights~Ramelteon 16 mg, tablets, orally over two nights~Ramelteon 32 mg, tablets, orally over two nights~Ramelteon placebo-matching tablets, orally over two nights"