Wow. I had no idea, I've been taking that for years. It's in every single OTC cold and flu medication with painkillers. I found this to be a good read/overview

Wow. I had no idea, I've been taking that for years. It's in every single OTC cold and flu medication with painkillers. I found this to be a good read/overview: https://www.science.org/content/blog-post/uselessness-phenylephrine https://www.science.org/content/blog-post/uselessness-phenyl...