Cefixime — Uses, Dosage, Side Effects, and Safe Buying Tips

Cefixime is a common oral antibiotic used to treat certain bacterial infections. It's part of the cephalosporin family and fights bacteria by stopping cell wall growth. Doctors often prescribe it for ear infections, sinusitis, bronchitis, urinary tract infections and some sexually transmitted infections.

How cefixime is used and dosed

Cefixime usually comes as tablets or liquid suspension. Adults often take 400 mg once daily or 200 mg every 12 hours, but your doctor will set the exact dose for your infection and health status. For children, the dose is based on weight and the liquid form is common. Finish the full course even if you feel better within a few days. Stopping early can let bacteria return and encourage resistance.

Before you start cefixime tell your doctor about allergies to penicillin or cephalosporins, kidney problems, or if you are pregnant or breastfeeding. Take it with or without food, although some people prefer it with food to avoid stomach upset. If you miss a dose, take it when you remember unless it’s almost time for the next dose—don’t double up.

Side effects, interactions, and resistance

Common side effects are nausea, diarrhea, stomach pain, and headache. If you see hives, swelling, severe diarrhea, or signs of a serious allergic reaction, get medical help right away. Cefixime can interact with blood thinner warfarin and some other drugs, so mention any medicines or supplements you use.

Antibiotic resistance matters. Using cefixime when it’s not needed or stopping early boosts resistance. Tests like cultures help doctors pick the right antibiotic. If an infection doesn't improve in a few days, check back with your provider.

Buy cefixime only from licensed pharmacies with a prescription. Online pharmacies can be safe if they require a valid prescription, show company details, and use secure payment. Watch out for sites selling antibiotics without prescriptions or at extremely low prices—these can sell fake or poor-quality medicine.

Store tablets and liquid suspension in a cool, dry place away from children. Some liquid forms need refrigeration—follow the label. Dispose of unused antibiotics safely; don’t share leftovers with others.

If you have diarrhea after taking antibiotics, avoid anti-diarrheal drugs unless your doctor says to use them. Probiotics may help restore gut flora but ask your provider first. For urinary symptoms, a urine test helps confirm if cefixime is right. If symptoms return after finishing the course, get retested.

Common misconceptions include thinking cefixime treats viral infections like colds or the flu. It does not. Using antibiotics for viruses does nothing and can cause side effects. Another tip: keep a list of past antibiotic reactions and share it with every provider. If you have kidney disease your dose may change, so bring recent lab results. When traveling abroad, carry the prescription and original packaging to avoid customs trouble. Ask questions when unsure.