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Erythromycin vs. Amoxicillin

Erythromycin is an antibiotic that's used to treat a variety of infections caused by bacteria, including certain skin and respiratory infections. The dosage depends on the specific infection you're using it for. The most common side effects are related to the stomach, like nausea, vomiting, and diarrhea. Erythromycin comes in two forms that are taken by mouth: oral tablets and an oral suspension.

• Respiratory infections (including upper respiratory tract infection and lower respiratory tract infection)
• Listeria infection
• Skin infections
• Pertussis (whooping cough)
• Diphtheria infection
• Intestinal amebiasis
• Sexually-transmitted infections, STIs (e.g., chlamydia, gonorrhea, syphilis)
• Legionnaires’ Disease
• Prevention of rheumatic fever

• Nausea
• Vomiting
• Stomach pain
• Diarrhea
• Anorexia

• Liver damage
• Life-threatening changes in your heart rhythm (QT prolongation)
• Syphilis in infants
• Severe diarrhea
• Interactions with other medications
• Worsening of myasthenia gravis
• Intestinal blockage in babies

Amoxicillin (Amoxil) is a penicillin antibiotic that's used to treat a wide variety of bacterial infections, such as sinus infections, ear infections, strep throat, and urinary tract infections (UTIs). It's available as oral pills, a chewable tablet, and an oral liquid. Amoxicillin (Amoxil) is well-tolerated, but possible side effects include diarrhea, vomiting, and rash.

• Upper respiratory tract infections (ear, nose, and throat infections)
• Lower respiratory tract infections (e.g., pneumonia, bronchitis)
• Urinary tract infections (UTIs)
• Skin infections (e.g., cellulitis)
• Helicobacter pylori infection (adults only)

• Diarrhea
• Nausea
• Vomiting
• Rash

• Severe allergic and skin reactions
• Diarrhea from Clostridioides difficile infection
• Development of drug-resistant bacteria