Antibiotics are one of modern medicine's most important discoveries — they have saved countless lives and made once-deadly infections curable. But precisely because we take them for granted, it is easy to forget that they are powerful medicines that must be used thoughtfully. This article explains what antibiotics are, what they act on and what they do not, and why responsible use matters not just for you but for everyone.

Note: this article is general, educational information and does not replace advice from a doctor or pharmacist. Take antibiotics only as directed by a doctor.

What antibiotics are

Antibiotics are medicines that act against bacteria — they kill them or stop them from multiplying. Thanks to them, bacterial infections that were once dangerous can today usually be cured.

It is essential to understand what antibiotics cannot do: they do not act on viruses. The common cold, the flu, and most sore throats and sinus inflammations are caused by viruses, so an antibiotic does not help — it will not shorten the illness or ease the symptoms. Taking an antibiotic "just in case" for a viral infection brings no benefit and can do harm.

Why an antibiotic does nothing for a cold

Many people reach for an antibiotic the moment a cold or cough takes hold, believing it will speed recovery. But because these complaints are almost always viral, an antibiotic changes nothing. The judgement of whether an infection is bacterial and needs an antibiotic is made by a doctor, based on an examination and, if needed, tests.

That is why an antibiotic is not a medicine to "borrow" or to take from the leftovers of an earlier course. What helped someone with one infection may be entirely wrong for another.

How antibiotic resistance develops

The most serious reason for caution is antibiotic resistance. When antibiotics are used too often or incorrectly, bacteria gradually adapt and develop resistance — an antibiotic that once worked no longer helps.

This is not just an individual's problem. Resistant bacteria spread between people, so infections that were once easy to treat become harder and harder to control. The World Health Organization ranks antibiotic resistance among the greatest threats to public health. Every unnecessary or improper use of antibiotics speeds this process up.

How to use antibiotics responsibly

The good news is that everyone can help by using antibiotics correctly:

  • Take them only when a doctor prescribes them — never on your own initiative or on someone else's advice.
  • Finish the whole course as prescribed — even when you feel better before the end. Stopping too early leaves the most resistant bacteria alive.
  • Respect the dose and the intervals between doses, as stated.
  • Do not save leftovers for some future occasion, and do not share an antibiotic with others.
  • Return unused antibiotics to a pharmacy for proper disposal, not to the household rubbish or the toilet.

If you are unsure how to take a prescribed antibiotic or you have missed a dose, a pharmacist can help — and is available without an appointment.

Prevention is easier than treatment

The best way to avoid needing antibiotics is to prevent infections: regular hand-washing, vaccination as recommended, and staying home when you are ill all reduce the spread of infection. Fewer infections mean less need for antibiotics — and so a slower development of resistance.

When you need a medicine outside regular hours

When a doctor prescribes you an antibiotic and the regular pharmacies are already closed, the medicine still needs to be collected in time so the course starts as it should. dezurna.net shows, in one place, which pharmacy in your town is open right now, so you do not put off a prescribed course longer than you must.