Amoxicillin Capsules or Tablets Amoxicillin is a type of penicillin antibiotic that treats infections caused by bacteria. It doesn’t treat colds, the flu or infections caused by viruses. Common brand names include Amoxil®, Moxilin®, Sumox® and Trimox®. Description Amoxicillin is used to treat bacterial infections in many different parts of the body (ear, lungs, nose, sinus, skin, urinary tract). It is also used with other medicines (eg, clarithromycin, lansoprazole) to treat H. pylori infection and duodenal ulcers. Amoxicillin is also used to treat tonsillitis and pharyngitis (sore throat). Amoxicillin belongs to the group of medicines known. Learn about the side effects of amoxicillin, from common to rare, for consumers and healthcare professionals. Find patient medical information for Amoxicillin (Amoxil and others) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Amoxicillin may cause mild side effects, including stomach issues, headaches, and yeast infections. Less commonly, people may have more severe reactions like seizures. Amoxicillin is a penicillin. Amoxicillin is among the most widely prescribed antibiotics worldwide. It helps fight bacterial infections like ear infections, strep throat, and urinary tract infections. While it’s very effective, like all medicines, amoxicillin can cause side effects. Knowing what to expect can help you use it safely and feel more confident about your treatment. Side effects of amoxicillin Like all medicines, amoxicillin can cause side effects in some people, but many people have no side effects or only minor ones. Common side effects of amoxicillin These common side effects of amoxicillin can happen in up to 1 in 10 people who take the medicine. There are things you can do to help cope with them: Skin. Amoxicillin is known to cause nausea, diarrhea, and skin rashes. Here are the most common amoxicillin side effects and how to cope with them. Amoxicillin may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away: nausea, vomiting, diarrhea temporary discoloration (yellow, brown, or gray color) of your teeth Some side effects can be serious. If you experience any of these symptoms, stop taking amoxicillin and call your doctor immediately or get emergency medical treatment: rash, itching, hives. Rash, diarrhea, and headache are common amoxicillin side effects. Learn how long side effects of amoxicillin last and how to avoid them.