http://www.medications.com/effect/view/22240 My 41/2 year old has been taking Singulair for about 2 years. It has done wonderful things related to her asthma. But she does complain of frequent stomach pains which I see others also have. However, she is not saying she has severe aching in teeth. She sa Wed, 11 Jul 2007 04:05:32 -0400 http://www.medications.com/effect/view/22240?item=704 My daughter also takes singular... it has done wonders as well for her asthma! I haven't noticed any side effects and she hasn't mentioned any. She is 9 years old. http://www.medications.com/effect/view/22240?item=704