Singulair Side Effects: Hi, I began taking Singulair for allergies, 2 week's ago. For http://www.medications.com/effect/view/36683 Hi, I began taking Singulair for allergies, 2 week's ago. For the first time in my life, I am suffering insomnia. I am waking up at 4.30am / 5am. This has only happened since I have started taking this drug. After finding this site, I have realized th Wow. It never occurred to me back then, but I too was consistent Tue, 18 Nov 2008 18:03:04 -0500 http://www.medications.com/effect/view/36683?item=14629 Wow. It never occurred to me back then, but I too was consistently waking up at exactly 4:30 every morning. At the time I was taking Singular and Serevant(?). I have had asthma most of my life and will tell you it stinks. During high school, I could ba http://www.medications.com/effect/view/36683?item=14629