Edit: OP is a cool guy
Hi, I'm a pharmacist
Can you please edit your post to say a common decongestant in cold medicines such as Sudafed PE? It's inaccurate to say it's in Sudafed.
Sudafed is the brand name for pseudoephedrine and it very much is effective. Phenylephrine is in the Sudafed PE which only exists because you need to use a driver's license to get Sudafed from the pharmacy in the US.