@Vikas there are two major ways we administer antibiotics: Either we take an infected sample and grow the microbes in it in a lab to determine what the infection is precisely caused by, which is how it's commonly done when you have the available time and resources, or we administer them based on wat we suspect the infection is caused by, based on previous experience, patterns of the infection, symptoms etc. The latter is called empiric antibiotic therapy.
The established consensus is empiric antibiotic therapy for common cold in healthy adults is not recommended, because the significant majority or these infections are caused by half a dozen completely different viruses. Antibiotics (like azithromycin) kill bacteria; they have no effect on viruses.
In other words, the cost of treating otherwise healthy aduls with symptoms of common cold (which is antibiotic resistance) is more than the benefit it would have on the few cases where the infection is bacterial, and not viral.
There is unfortunately no way to definitively tell them apart, a viral and a bacterial 'cold', based on signs and symptoms alone, and sample culture would simply be too expensive and impractical for every case. There are some patterns though. For example, if you're not coughing at all and you have inflamed tonsils or throat, it's more likely to be a bacterial infection than if you do cough.
What this means, practically, is that unless you have a condition that compromises your immune system, you shouldn't take antibiotics (azithromycin, amoxicillin-clavulanate, ceftriaxone, levofloxacin etc.) and let the cold run its course. You can take antihistamines to relieve the symptoms (runny nose, itchy throat, coughing etc.) but there is no magic pill to make it go away.
If, after, say, ten days to two weeks, your cold is getting worse instead of better, you develop new symptoms (like shortness of breath, pain in the ear and so on) then it's more likely to be a bacterial infection, and treatment with antibiotics is reasonable.
Even then, there's a proper antibiotics treatment protocol to follow. Just azithromycin won't be enough.
So, for once, chatGPT regurgitated its stolen feed properly.
OMG @Færd! Long time no chat! What's up? How are you doing these days?
Well let's just pretend my several typos up there aren't there.
New device. My hands aren't comfortable around the keyboard yet.
Oh, and I forgot to mention, in Iran, and I suspect also in India, some doctors will probably prescribe antibiotics anyway, because they don't care about antibiotic resistance or drug side effects @Vikas. It's their diagnosis though, so the best approach, paradoxically, would be to follow their advice as closely as you can, because they have the most oversight over your health.
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Deciding not to take the pill the doctor prescribed because of some random dude on the internet is how serious medical errors happen later on.