💊 5 Common Antibiotics Doctors Prescribe—and Why They Matter
Antibiotics treat certain bacterial infections. They do not work against viruses such as colds or influenza. The “best” antibiotic depends on the infection, local resistance patterns, allergies, kidney function, other medications, and individual circumstances.
Five commonly prescribed antibiotics include:
Amoxicillin
Often used for certain respiratory infections, ear infections, dental infections, and some other bacterial infections. It’s also part of certain combination treatments for H. pylori.
Azithromycin
A macrolide used for selected respiratory and other bacterial infections. It isn’t appropriate for every sore throat or chest infection, and resistance can limit its usefulness.
Doxycycline
Used for conditions including some respiratory infections, acne, and tick-borne infections. It has important precautions, including increased sensitivity to sunlight and interactions with certain minerals and antacids.
Cephalexin
A cephalosporin commonly used for some skin, soft-tissue, and urinary bacterial infections.
Ciprofloxacin
A fluoroquinolone used for selected bacterial infections when appropriate. Because it can cause potentially serious tendon, nerve, muscle, and other adverse effects, doctors generally reserve fluoroquinolones for situations where their benefits outweigh their risks.
Why antibiotic choice matters
Using the wrong antibiotic, wrong dose, or wrong duration can fail to treat the infection and contributes to antibiotic resistance. Antibiotics can also cause side effects ranging from diarrhea and nausea to serious allergic reactions or C. difficile infection.
Never use leftover antibiotics or someone else’s prescription, and don’t stop or change a prescribed course without discussing it with the prescriber.
If you tell me which infection you’re asking about (UTI, tooth infection, chest infection, skin infection, etc.), I can explain which antibiotics are commonly considered and why—without suggesting that you self-prescribe.
