Can my 15 yr. pld daughter take 2 day quil caps at 6:00p.m then take trazadone 50mg at 10:00p.m will it hurt her?

Check first: Mixing over the counter medications with prescription medications can be dangerous. Always check with your child's health care provider to see if it is safe to mix such medications. If in doubt, it is best to leave the over the counter medicine alone until you can check it out. Safety first; to ensure the continuing good health and well-being of your child.