Can you take melatonin if you take remeron and concerta?

My daughter takes concerta 36mg, and remeron 15mg. Can you take melatonin with these meds. I know I have to ask the doctor and I will, but I wanted to know if anyone else has an ADHD child who is not sleeping and has used Melatonin to help the sleeping
My daughter is 8 years old.

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