You may report side effects to FDA at 1-800-FDA-1088. What is the most important information I should know about amoxicillin? You should not use this medicine if you are allergic to any penicillin antibiotic. Along with its needed effects, amoxicillin may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention. Although not all of these side effects may occur, if they do occur they may need medical attention. All the information, content and live chat provided on the site is intended to be for informational purposes only, and not a substitute for professional or medical advice. Amoxicillin can be given (in severe situations) in doses of 6,000 mg or more per day, even all at once. And a single dose of 2,000 mg is not unheard of. And a single dose of 2,000 mg is not unheard of. Assuming the patient is an average adult, 2000mg/day of Amoxicillin is not too much. Whether it is the right dose depends on the infection and the condition of the patient. Is 2000 mg of prescribed Amoxicillin safe to take?. pump inhibitor) has been more effective, but potentially more troublesome (four drugs = four potential sources of side effects). As a rule of thumb, if you took recently the antibiotics prescribed to you for H. pylori eradication, it may be worthwhile to talk to your doctor. Most likely your bacteria have developed some resistance to the. To treat gonorrhea Amoxicillin is used at dose of 3000 mg (6 capsules of 500 mg), and should be taken only once. Children Dose should be adjusted according to body weight and it is usually 20-50 mg per kilogram of body weight. Side Effects. Drug information provided by: IBM Micromedex. Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention. Amoxicillin side effects. Amoxicillin is a penicillin antibiotic used to treat bacterial infections, including bronchitis, pneumonia, and infections of the ear, nose, throat, skin, and urinary tract. Find patient medical information for Amoxicillin Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings.