A trick for getting medicine into babies
The nurse at our pediatrian's office taught us a trick to get infants to swallow medicine: blow in their face. It surprises them so much they swallow as a reflex. We also used this, with moderate success, to surprise our little girl out of a crying loop. We call it "the reset button."
[This trick only worked once or twice on my son, but your mileage may vary. -- Ed.]