What is safer to take valium or zeroquill for a night sleep?

Neither: Valium is a brand of diazepam which is member of benzodiazepine class, used to treat many conditions but not w/o side effects & risks eg addiction, confusion, falls/fractures, even some link to Alzheimer's disease. Seroquel is a brand of quetiapine which is an antipsychotic with its own can of worms: weight gain, diabetes, high cholesterol & movement disorders ie tics. So try http://goo.gl/wTWbEv

Medication effects: It is likely that you are asking about Seroquel, (quetiapine) (not zeroquill) which is not a medication for sleep, and has many side effects. Valium is for Anxiety. By relieving Anxiety, it can help to sleep. It is habit forming and can be risky with the use of Alcohol Before sleeping, do Breathing and Music Relaxation, Visual imagery, and Meditation. See Psychiatrist for Therapy for stress and Medication