About Singulair and being INCOMPATIBLE: Merck acknowledges tha...

About Singulair and being INCOMPATIBLE: Merck acknowledges that there is a certain percentage of patients for which Singulair is "NOT EFFECTIVE" because of incompatibility issues. That problem is "all over" the research reports and clinical trials. Merck is even conducting research trials to try to determine why. The issue of being incompatible as the reason for negative adverse side effects is not recognized as of now. WHY? If Merck can recognize that Singulair is not effective or some patients, why doesn't it recognize that for others it causes negative side effects???