Provide a valuable resource to your clients or customers by linking to this resource page. Just place the following link on your website.
An antibiotic is a medicine used to treat bacterial infections. Antibiotics can kill bacteria or stop bacteria from growing. They do not treat viral infections such as colds, flu, or most sore throats. Antibiotics can be life-saving when used for the right infection and taken as prescribed.
read more about antibiotic ...Different antibiotics attack bacteria in different ways. Some damage bacterial cell walls, while others block protein production, DNA processes, or folate pathways that bacteria need to grow. The best antibiotic depends on the suspected bacteria, infection site, patient history, allergies, and local resistance patterns. A clinician can choose a narrow or broad treatment based on the situation.
Antibiotics are used for confirmed or strongly suspected bacterial infections. Examples can include strep throat, urinary tract infections, bacterial pneumonia, skin infections, and some ear or sinus infections. They are not helpful for viral colds or flu and can cause harm when used unnecessarily. Testing, exam findings, and symptom timing help clinicians decide whether antibiotics are needed.
Common antibiotic classes include penicillins, cephalosporins, macrolides, tetracyclines, fluoroquinolones, sulfonamides, aminoglycosides, and carbapenems. Examples include amoxicillin, cephalexin, azithromycin, doxycycline, ciprofloxacin, trimethoprim-sulfamethoxazole, and gentamicin. Some are taken by mouth, while others are given as injections, IV medicines, creams, ointments, or eye drops. Antibiotics are not interchangeable, so patients should use only the medicine prescribed for the current infection.
Antibiotics can cause diarrhea, nausea, rash, dizziness, yeast infections, or allergic reactions. Some can cause more serious problems, including C. difficile diarrhea, tendon injury, heart rhythm effects, kidney injury, or severe skin reactions. Unnecessary use can contribute to antibiotic resistance, which makes infections harder to treat. Seek urgent care for trouble breathing, facial swelling, severe rash, bloody diarrhea, severe weakness, or symptoms that worsen during treatment.
No, antibiotics do not treat viruses. They treat bacterial infections, so they do not work for colds, flu, or most viral coughs.
Take antibiotics exactly as the prescriber directs. Do not stop early, skip doses, or save leftover pills unless the prescriber changes the plan.
Yes, diarrhea is a common antibiotic side effect. Severe, watery, bloody, or persistent diarrhea needs medical care because it can signal C. difficile infection.
Antibiotic resistance happens when bacteria change in ways that make medicines less effective. This can make infections harder to treat and can limit future treatment options.
Antibiotics. MedlinePlus. https://medlineplus.gov/antibiotics.html. Date Accessed June 3, 2026.
Antibiotics: What To Know. Cleveland Clinic. https://my.clevelandclinic.org/health/treatments/16386-antibiotics. Date Accessed June 3, 2026.
Antibiotics and Antibiotic Resistance. U.S. Food & Drug Administration. https://www.fda.gov/drugs/buying-using-medicine-safely/antibiotics-and-antibiotic-resistance. Date Accessed June 3, 2026.
Antibiotic Resistance: A Global Problem and the Need to Do More. PMC. https://pmc.ncbi.nlm.nih.gov/articles/PMC10877623/. Date Accessed June 3, 2026.
About Antimicrobial Resistance. Centers for Disease Control and Prevention. https://www.cdc.gov/antimicrobial-resistance/about/index.html. Date Accessed June 3, 2026.