Generic Amoxicillin

Common Use
Amoxicillin is a broad-spectrum penicillin antibiotic used to treat bacterial infections such as respiratory tract infections, ear infections, urinary tract infections, and skin infections. It is also used to treat Helicobacter pylori in combination therapy for stomach ulcers. Amoxicillin works by inhibiting bacterial cell wall synthesis, leading to bacterial death.

Dosage and Direction
Amoxicillin is taken orally, usually 2–3 times a day, with or without food. The dose depends on the type and severity of infection, as well as patient age and kidney function. It’s important to complete the full course even if symptoms improve early.

Precautions
Tell your doctor if you have a history of allergic reactions to penicillin or other beta-lactam antibiotics. Use cautiously in patients with kidney impairment. Prolonged use may lead to secondary infections like oral thrush or yeast infections.

Contraindications
Amoxicillin is contraindicated in individuals with a known allergy to penicillin or cephalosporins. It should be avoided in patients with infectious mononucleosis due to high risk of skin rash. Severe liver dysfunction may also require alternative treatment.

Possible Side Effects
Common side effects include nausea, diarrhea, skin rash, and headache. Serious reactions may include anaphylaxis, Clostridium difficile-associated diarrhea, or liver enzyme elevation. Report any signs of allergic reaction, such as swelling or difficulty breathing.

Drug Interaction
Amoxicillin may interact with oral contraceptives (reducing their effectiveness), allopurinol (increased risk of rash), and anticoagulants like warfarin (increased bleeding risk). Always inform your doctor about all medications you are taking.

Missed Dose
If you miss a dose, take it as soon as you remember. If it is almost time for the next dose, skip the missed one. Do not double the dose to make up for the missed one.

Overdose
Symptoms of overdose may include nausea, vomiting, diarrhea, or crystalluria (crystals in urine). In severe cases, kidney function may be affected. Seek medical help immediately if an overdose is suspected.

Storage
Store amoxicillin capsules or tablets at room temperature away from moisture and heat. Liquid suspension should be refrigerated and used within the prescribed time. Keep out of reach of children.

Disclaimer
We provide only general information about medications which does not cover all directions, possible drug integrations, or precautions. Information at the site cannot be used for self-treatment and self-diagnosis. Any specific instructions for a particular patient should be agreed with your health care advisor or doctor in charge of the case. We disclaim reliability of this information and mistakes it could contain. We are not responsible for any direct, indirect, special or other indirect damage as a result of any use of the information on this site and also for consequences of self-treatment.

Clinical Verification

Last Clinically Updated: August 15, 2026

Written By

Dr. Elena Vance, PharmD

Clinical Specialist in Neuropharmacology

Fact Checked By

Marcus Thorne, MS

Biomedical Data & FDA Label Verification

Medically Reviewed By

Dr. Arthur Campbell, MD

Board-Certified Psychiatrist (ABPN)