DISCONTINUED BRANDS: Amoxil, Dispermox, Trimox, and Larotid. PRESCRIPTION: Yes. GENERIC AVAILABLE: Yes. USES: Amoxicillin is used to treat infections due to bacteria that are susceptible to the effects of amoxicillin. Common bacterial infections that amoxicillin is used for include infections of the middle ear, tonsils, throat, larynx (laryngitis), bronchi (bronchitis), lungs (pneumonia), urinary tract, and skin. It also is used to treat gonorrhea. SIDE EFFECTS: Side effects due to amoxicillin include: diarrhea,