http://www.medications.com/effect/view/24122 Actually I have a Question, I was experiencing a bad headache Wed.night, used an ice pack, took 3 tylenol & later Darvocet every 4 hours for pain, I woke up Thurs.morning with my neck all red and burning sensation. I am also on Singulair, Xanax, Calcium and Tue, 19 Feb 2008 13:33:43 -0500 http://www.medications.com/effect/view/24122?item=4934 The redness is a normal side affect to the darvacet. There is no real concern as far as that alone goes. The real issue, is you are mixing quite a volatile combination of RX meds. You really need to focus more on natural remedies to some of your problems, http://www.medications.com/effect/view/24122?item=4934