For example, many OTC "severe cold/flu" formulations contain:
- Acetaminophen. Potentially helpful for the body aches that come with the flu, but a lot of the time when I'm sick, I don't exactly need or benefit from a pain reliever. If you have a fever it can reduce it, but for a minor fever I'm not sure that is necessary.
- A cough suppressant (Dextromethorphan) and an expectorant (Guaifenesin). Most recommendations I've read advise taking one or the other depending on the type of the cough, but not both. For a productive cough, a cough suppressant can be counterproductive.
- For PM formulations, an antihistamine as a sleep aid.
- And of course Phenylephrine as a decongestant, which doesn't work.
People feel sick and they go in and just say "I'll take whatever is strongest" and they get overcharged for these weird formulations that are sort of kitchen-sink type things. I guess they are mostly harmless but you wind of spending $20 for pennies worth of out-of-patent ingredients that might actually make you feel a bit worse.
And yeah, if you are actually congested, go to the pharmacy counter and get Pseudoephedrine. It costs next to nothing and in my experience works.