Singulair Side Effects: I've been on Singulair 10mg tablets for only 4 days to alleviate http://www.medications.com/effect/view/41562 I've been on Singulair 10mg tablets for only 4 days to alleviate seasonal allergies and have been suffering from very bad cramping in my feet, legs, hands, arms and upper body. Additionally I have experienced what feels like bloating and a hardening of the Please report you adverse reaction to the FDA or if in Canada to Mon, 18 May 2009 09:28:52 -0400 http://www.medications.com/effect/view/41562?item=19916 Please report you adverse reaction to the FDA or if in Canada to Health Canada.You will help in our fight. http://www.medications.com/effect/view/41562?item=19916