What amoxicillin, amoxicillin-clavulanate, azithromycin, ciprofloxacin, clarithromycin, clindamycin and doxycycline are used for, and how to take antibiotics safely.
Antibiotics only work on bacteria
Antibiotics treat infections caused by bacteria. They don't work for colds, flu, most sore throats or other viral infections – and taking them when they aren't needed causes side effects and helps bacteria become resistant. All the antibiotics below need a prescription in the US.
Common antibiotics at a glance
| Antibiotic | Brand examples | Often prescribed for | Good to know |
|---|---|---|---|
| Amoxicillin | Amoxil | Ear, throat, chest and dental infections | A penicillin – not for people with a penicillin allergy |
| Amoxicillin-clavulanate | Augmentin | Sinus, ear, skin and bite infections, UTIs | Take with a meal to reduce stomach upset |
| Azithromycin | Zithromax, Z-Pak | Chest, sinus and some other infections | Short course – often 3 to 5 days |
| Ciprofloxacin | Cipro | Urinary tract and some other infections | Can damage tendons and nerves – kept for when other options don't suit |
| Clarithromycin | Biaxin | Chest and throat infections, H. pylori | Interacts with many medicines |
| Clindamycin | Cleocin | Skin, dental and bone infections | An option with a penicillin allergy; watch for severe diarrhea |
| Doxycycline | Vibramycin | Chest infections, acne, Lyme disease, malaria prevention | Take upright with water; avoid strong sun |
Outside the US you may see other brand names for the same medicines – for example Augmine or Moxikind for amoxicillin products, or Azee and Azithral for azithromycin.
Taking antibiotics safely
- Finish the course exactly as prescribed, even if you feel better.
- Don't save antibiotics for later or share them.
- Tell your prescriber about allergies – especially to penicillin – and about all your other medicines.
- Call your doctor about severe or bloody diarrhea, a rash, or symptoms that don't improve within a few days.
We sell FDA-approved amoxicillin, azithromycin, ciprofloxacin, clarithromycin, clindamycin and doxycycline, dispensed after our pharmacist verifies your prescription.