Antibiotics are medicines used to prevent and treat certain bacterial infections. Some kill bacteria; others slow their growth. They do not treat viral illnesses such as colds or influenza. That distinction matters in a crowded clinic, where a cough alone cannot identify its cause.
WHO’s 2023 fact sheet cites estimates for 2019: bacterial antimicrobial resistance was estimated to directly cause 1.27 million deaths worldwide. It was associated with 4.95 million deaths. The U.S. Centers for Disease Control and Prevention has estimated that at least 30% of outpatient antibiotic prescriptions in the United States were unnecessary. Those figures help explain the question: Why are antibiotics used carefully? Unnecessary exposure can help resistant bacteria survive and spread. Yet withholding treatment from someone with a serious bacterial infection can also cause harm. WHO Director-General Dr. Tedros Adhanom Ghebreyesus said, “Antimicrobial resistance is one of the top global public health and development threats.” His warning reaches the examination room, where clinicians weigh symptoms, medical history, test results, and likely benefits. The right choice may involve a specific medicine, dose, and duration—or no antibiotic. The decision is not always tidy. Symptoms overlap, and test results may take time. Not a trivial choice. That uncertainty deserves honest explanation, not casual prescribing. A prescription is not harmless simply because it is familiar. Careful use protects patients today and preserves treatment options for tomorrow.
What Are Antibiotics and Why Are They Used Carefully?
What Antibiotics Are and How They Differ from Other Medicines
Antibiotics are medicines used to treat certain bacterial infections. Some kill bacteria; others slow their growth, giving the body’s defenses time to respond. They are not treatments for viral illnesses such as colds or flu. Unlike pain relievers, which can ease discomfort without removing its cause, antibiotics act on bacterial processes, such as building a cell wall. Different infections need different medicines, and the right choice depends on clinical assessment. The distinction matters.
Antibiotics can also affect helpful bacteria, and unnecessary use can encourage resistant bacteria to survive and spread. A major analysis published in The Lancet estimated that bacterial antimicrobial resistance directly caused 1.27 million deaths worldwide in 2019. That figure describes resistance, not deaths caused by antibiotics themselves. Still, it shows why prescribing decisions matter. Early symptoms can be ambiguous; even careful clinicians sometimes need time or test results to identify an infection.
Tips: Take antibiotics only as prescribed, and follow your clinician’s instructions. Do not share leftover medicine or save it for another illness. Ask whether testing or watchful waiting is appropriate. Small choices count.
| Medicine type | Main target or purpose | Examples of generic medicines | What it may be used for | Why careful use matters |
|---|---|---|---|---|
| Antibiotics | Treat certain bacterial infections by killing bacteria or stopping them from multiplying. | Amoxicillin, doxycycline, azithromycin | Some bacterial infections, selected according to the likely cause, infection site, and patient factors. | Unnecessary or inappropriate use can contribute to antibiotic resistance and may cause side effects. They do not treat viral infections such as colds or influenza. |
| Antivirals | Act against particular viruses or stages of viral replication. | Acyclovir, oseltamivir | Certain viral infections, depending on the medicine and timing of treatment. | They are virus-specific and are not substitutes for antibiotics when a bacterial infection is present. |
| Antifungals | Treat infections caused by fungi, such as yeasts or molds. | Fluconazole, terbinafine | Some fungal infections of the skin, nails, or other parts of the body. | The right treatment depends on the type and location of the fungal infection; these medicines do not treat bacterial infections. |
| Pain relievers (analgesics) | Relieve pain; some also reduce fever or inflammation. | Paracetamol (acetaminophen), ibuprofen | Pain or fever symptoms; they do not directly eliminate the cause of an infection. | Safe use depends on the medicine, dose, health conditions, and other medicines being taken. |
| Corticosteroids | Reduce inflammation and immune-system activity. | Prednisone, hydrocortisone | Selected inflammatory, allergic, or immune-related conditions. | They are not antibiotics and can affect immune responses; use should follow professional guidance. |
Antibiotics should be used only when appropriate for a bacterial infection or another specific medical indication. Follow the prescriber’s instructions, and ask a healthcare professional if you have questions about a prescription.
No. They treat bacterial infections, not common viral illnesses like colds or flu.
Unnecessary use can cause side effects without helping symptoms. It can also encourage bacteria to survive and spread, making some infections harder to treat later.
No. Bacteria become resistant; people do not. Resistant infections may need longer or more difficult care.
Nausea, diarrhea, and rashes can occur. Some medicines may disrupt helpful gut bacteria. Rarely, a severe allergic reaction can happen.
Get urgent help for trouble breathing or facial swelling. Contact a clinician about other bothersome effects.
Check the medicine instructions or ask a pharmacist. Don’t double it unless a clinician tells you to.
No. Take antibiotics only when prescribed for you, and follow the directions. Leftovers may not suit another illness.
Yes. A clinician can consider your symptoms, medical history, likely cause, and local guidance. Waiting may feel frustrating when a cough interrupts sleep, but some infections need prompt treatment.
Ask what improvement to expect and which symptoms need follow-up. Feeling reassured by a prescription is understandable, but that feeling alone isn’t proof it’s needed.
Antibiotics are medicines designed to treat certain infections caused by bacteria. They work by killing bacteria or stopping them from multiplying, giving the body a chance to recover. They do not treat viral illnesses such as colds or flu, so they are useful only when an infection is likely to be bacterial and an appropriate medicine is selected.
Why are antibiotics used carefully? Taking them when they are not needed, or not following the prescribed directions, can cause side effects and encourage bacteria to become resistant to treatment. Resistant bacteria may be harder to manage in the future. Using antibiotics only when advised by a qualified health professional, and taking them exactly as directed, helps protect both individual health and the effectiveness of these medicines for others.
SJ medical