Can I give my 22-month-old child a quarter of a 5mg melatonin to help her fall asleep more quickly instead of taking 30 minutes to an hour?

It is not recommended to give a 22-month-old child melatonin without consulting a doctor first. There are other methods, such as establishing a consistent bedtime routine and using calming teas like chamomile, that can help with sleep. Consulting a healthcare professional can help determine the best course of action for your child's sleep troubles.