http://www.medications.com/effect/view/40213 I have been taking Singulair for runny nose due to allergies. I never associated things I was experiencing with this drug as my MD said there were no side effects, I have experienced weird vivid dreams, depression, hair loss, leg cramps, feeling tired all t Tue, 24 Mar 2009 07:06:36 -0400 http://www.medications.com/effect/view/40213?item=18418 Please report your side effects to the FDA and Merck. Please visit us at www.parentsforsafety.org. I am so happy you finally made the connection. Take Care. http://www.medications.com/effect/view/40213?item=18418