Efficacy and safety of zolpidem-MR: a double-blind, placebo-controlled study in adults with primary insomnia.

Background And Purpose: To evaluate the clinical efficacy and safety of modified-release zolpidem (zolpidem-MR 12.5mg) for the treatment of primary insomnia in adults.

Patients And Methods: Two hundred and twelve (123 women, 89 men; mean age 44.