We don’t use food or drinks to dissolve his meds - we buy flavored syrup from our local children’s hospital.  I thinks it’s just a corn syrup base with color and flavor added... it’s what they use to prepare meds at the pharmacy.  We just dissolve the tablets in 1 ml of water, then add 1 to 1.5 ml of syrup.  His faves are grape and cherry.  He sees us coming with this med syringe and just opens right up; pretty amazing at his age.  We follow that with a couple of syringefuls of water, just to make sure we get all of the medication out of the syringe.