At a glance
- Bacteria can become resistant to one or more antibiotics.
- An antibiotic does not help a viral infection and can still cause side effects.
- Using the right medicine only when needed supports its future effectiveness.
- Resistance is a shared public-health challenge, not an individual failing.
How resistance develops and spreads
Bacteria can change or acquire traits that help them survive antibiotics. When a medicine is used, susceptible bacteria may be reduced while resistant ones survive and multiply. Resistant bacteria can spread between people and through communities.
This does not mean someone who has previously used antibiotics can never benefit from them. It means the choice of treatment needs to fit the infection and current evidence.
What you can do
Only use antibiotics when a healthcare professional recommends them. Follow your own label, ask about unclear instructions and never share or save a prescription for a future illness. Infection prevention, such as hand hygiene and vaccination, also reduces the need for antibiotics.
If you are worried a prescription is not working, speak to a clinician. Do not change the medicine or duration based on a general web article.
Why researchers revisited older medicines
As resistance grows, understanding how existing antibiotics perform remains important. The former AIDA project examined older, off-patent medicines in clinical research; its historical work is separate from this educational website.
Sources
Original references- WHO · Antimicrobial resistance
- NHS · Antibiotic resistance
- CDC · Antibiotic do’s and don’ts
- European Commission CORDIS · AIDA project record (278348)
These sources informed this overview. Their organisations do not endorse or review this website.
This page is for general education only. It does not replace advice from a doctor, pharmacist or other qualified healthcare professional. Read our medical disclaimer.