Can I Include in my medical deductions for my autistic grandson who is not a dependent but I pay all related expenses?

[CherylW]

This, from IRS Publication 502:

Whose Medical Expenses Can You Include?

You can generally include medical expenses you pay for yourself, as well as those you pay for someone who was your spouse or your dependent either when the services were provided or when you paid for them.

If he is NOT your dependent, then you can not take off the medical expenses.