i work for a chiropractor so i use it quite often for my daughter while she's teething. when she's really bad she gets it every hr. but if she seems to be doing ok she gets it 3x a day. i dilute one pellet in 4oz of water and give her about 2 syringes if it. when she seems to be 70% better is when i am told to stop.
for stuffiness, gas, fever, and cold-like symptoms during teething i use arcinicum (the same way i use the chamomilla).