Kenalog Side Effects: I went to the Doctor January 23, 2009 for sinus drainage and cong http://www.medications.com/effect/view/38868 I went to the Doctor January 23, 2009 for sinus drainage and congestion. I received the Kenalog 40 shot not knowing what it was they were giving me I just thought it was just like any other shot that I had received. They didn't explain any side effects or a Only about 5% of people have bad reactions to kenalog. We just h Thu, 12 Mar 2009 22:25:34 -0400 http://www.medications.com/effect/view/38868?item=17932 Only about 5% of people have bad reactions to kenalog. We just happen to be in the 5. The reactions will vary from individual. My doctor has actually gone before the hospital board and warned them of a patients reactions (me) to kenalog. I spent thousa http://www.medications.com/effect/view/38868?item=17932