E.E.S. (Erythromycin Ethylsuccinate) is a broad range antibacterial medication that your doctor may prescribe if it has been established that your symptoms and/or medical testing has shown you have a bacterial infection. Doctors have become aware of the increasing number of drugs that bacteria have grown resistant to because of the wide-spread use of antibiotics. E.E.S. is usually prescribed to treat intestinal amoebiasis, respiratory tract infections, and reproductive organ infections. Erythromycin Ethylsuccinate may also be prescribed to treat or prevent rheumatic fever (RF), an inflammatory disease that can occur after infection with the Streptococcus bacteria.

Macrolides, such as E.E.S., are bacteriostatic drugs. This means that the medication does not kill the bacteria but prevents their growth by inhibiting an essential protein that bacteria need to survive and reproduce. Your immune system will put an end to the infection as existing bacteria eventually die off and there is no new growth. This is why it is important to take this medication as instructed and for the period stated because skipping doses or stopping before the suggested time may result in the bacteria that exist making a come-back. Side effects of E.E.S. may include nausea, vomiting, diarrhea, or mild heartburn.