“Antibiotics can treat the common cold”

The idea that antibiotics can cure the common cold is a widespread misconception, stemming largely from the remarkable success of these drugs against bacterial infections since their widespread use in the 20th century. People often experience similar uncomfortable symptoms like fever, cough, and congestion whether they have a viral or bacterial illness, making it difficult to differentiate between the two without medical testing. This can lead to a natural desire for a quick fix, and in some cases, historical practices where antibiotics were prescribed for viral infections due to patient demand further cemented this belief.

However, the scientific reality is that antibiotics are specifically designed to target bacteria, not viruses. Bacteria are living, single-celled organisms that can reproduce independently, and antibiotics work by either killing them directly or inhibiting their growth, often by attacking their cell walls or internal processes. In contrast, the common cold is caused by viruses, which are much smaller and fundamentally different. Viruses are essentially genetic material encased in a protein shell and cannot reproduce on their own; they invade host cells and hijack (Review) their machinery to multiply.

Because antibiotics have no mechanism to combat viruses, taking them for a cold is entirely ineffective. It's like trying to fix a computer problem with a hammer; the tool simply isn't suited for the task. Furthermore, the misuse of antibiotics carries significant risks beyond simply not helping your cold. It can lead to unpleasant side effects like stomach upset or rashes and, more critically, contributes to the growing global problem of antibiotic resistance. When antibiotics are used unnecessarily, bacteria can evolve and become resistant to the drugs, making future bacterial infections much harder, and sometimes impossible, to treat.