HELP!

Other Mamas I need your advice!!!
All you ladies out there who read this and never comment now is a chance I want you to speak up.
We are really having a giant battle of wills when it comes to Taft's medicine routine. He must take meds several times a day in large disgusting doses. They are liquid, but he will not willingly open his mouth. Singing, distractions, toys, Ipod playing, bribing with an M&M, everything has not worked! Nothing short of me holding him down with my entire weight and prying his mouth open is getting the medicine down. We are both in tears by the time the meds disappear down his throat, the Mommy praying. We have had this problem in the past, and just suffered until the med cycle was complete. But this issue is going to be for several months, so a solution is required!
How do you convince your toddler to take medication?
side note: His vitamins are liquid, and he willingly takes them????????