Sales of Merck's asthma and allergy drug Singulair dropped 1% to ...

Sales of Merck's asthma and allergy drug Singulair dropped 1% to $1.1 billion for the second quarter. U.S. sales have been hurt by the recent introduction of an over-the-counter version of rival drug Zyrtec by Johnson & Johnson (JNJ), as well as concerns about the Food and Drug Administration's March alert of a possible association between Singulair and suicide and related behavioral side effects Got this off cnn money,i don't know but thought zyrtec and singulair were different drugs,my son at one time was prescribed both to take at bedtime