Can we itemize medical expenses on our U.S. taxes if we are paying $200 every month for medication to treat my aging mother-in-law's medical condition if she is not American and is living abroad? Thanks!

living abroad where??; your MIL, as you can see, need to be your dependent on your return;to be your dependent , your MIL MUST be a U.S. citizen, U.S. resident alien, U.S. national, or a resident of Canada or Mexico for part of the year