The sinus headaches are a physical reaction though. It's from constriction of the sinuses. When you take these it relaxes and the snot in your nose drains. I ha

The sinus headaches are a physical reaction though. It's from constriction of the sinuses. When you take these it relaxes and the snot in your nose drains. I had sinus headaches for 23 years (not realizing they were sinus headaches), took all sorts of headache pills, they were ineffective. These are effective for me, I do not think it is placebo.