"i am in my seventies and have taken zolpidem for about 3 years. i split 10 mg pills into thirds. i take one at sleep time, another when i wake up, take another if it is still early in morning when i wake up again. sometimes i take 4 in a night. so i take from 2 to 4 each night, which works well. using the split pills gives me control on dosage, versus cr. i am really glad to have it."