I'm surprised no one has suggestion the medication cup. Google it (not sure what its called). Its a cup with a little lip for the medication, designed to make it go right down with fluid. Worked very quickly for both my kids, including my DS with an ASD.
DO NOT GRIND OPEN OR CRUSH THE MEDS, unless your doctor tells you that you can. Don't even rely on teh pharmacist. This is an incredibly important safety issue and will mess with how quickly the meds enter your DCs bloodstream. Many times its fine, but you really, really can't just assume you can do this.