Flomax Side Effects: Terrible constipation, stuffed sinus, stopped taking after 40 day http://www.medications.com/effect/view/32205 Terrible constipation, stuffed sinus, stopped taking after 40 days, and strangely after 15 days my nocturia has not returned, i wonder how long this drug remains in the body? David T( London) check out Thu, 10 Jul 2008 11:41:24 -0400 http://www.medications.com/effect/view/32205?item=9950 check out http://www.medications.com/effect/view/32205?item=9950