Singulair Side Effects: Singulair does interact with the astrocyte in the brain. The r http://www.medications.com/effect/view/29754 Singulair does interact with the astrocyte in the brain. The role of the cysLT1 receptor (Singulair blocks this receptor) and the astrocyte in the brain has been studied. For anyone from Merck to say that there are no mechanisms by which Singulair can a HERE HERE.i second that Sun, 20 Apr 2008 13:28:49 -0400 http://www.medications.com/effect/view/29754?item=7463 HERE HERE.i second that http://www.medications.com/effect/view/29754?item=7463 If anybody who knows what they are doing looks at the relationshi Sun, 20 Apr 2008 13:35:06 -0400 http://www.medications.com/effect/view/29754?item=7464 If anybody who knows what they are doing looks at the relationship between the cysLT1 receptor and the brain, they would know that severe hypoglycemia or oxygen deprivation could cause a real problem if the normal pathways are inhibited and Singulair could http://www.medications.com/effect/view/29754?item=7464