E.E.S. 400 Liquid: Each 5-mL teaspoonful of orange-flavored suspension contains erythromycin ethylsuccinate equivalent to 400 mg of erythromycin. Granules and ready-made suspensions are. Erythromycin Ethyl Succinate Tablets package insert / prescribing information for healthcare professionals. Includes: indications, dosage, adverse reactions and pharmacology. E.E.S. 400 Liquid: Each 5-mL teaspoonful of orange-flavored suspension contains erythromycin ethylsuccinate equivalent to 400 mg of erythromycin. Granules and ready-made suspensions are. Erythromycin is easily inactivated by gastric acid; therefore, all orally administered formulations are given as either enteric-coated or more-stable salts or esters, such as erythromycin ethylsuccinate. E.E.S. (Erythromycin Ethylsuccinate) may treat, side effects, dosage, drug interactions, warnings, patient labeling, reviews, and related medications including drug comparison and health resources. erythromycin ethylsuccinate will decrease the level or effect of levonorgestrel oral/ethinylestradiol/ferrous bisglycinate by altering intestinal flora. Applies only to oral forms of hormone. Find patient medical information for Erythromycin (E.E.S., E-Mycin, and others) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings What Is Erythromycin Ethyl Succinate and How Does It Work? Erythromycin Ethyl Succinate is a prescription medication used for treating different types of bacterial infections. Erythromycin Ethyl Succinate is available under the following different brand names: E.E.S., EryPed. Erythromycin Ethylsuccinate reference guide for safe and effective use from the American Society of Health-System Pharmacists (AHFS DI). Erythromycin may cause diarrhea, and in some cases it can be severe. It may occur 2 months or more after you stop using this medicine. Do not take any medicine to treat diarrhea without first checking with your doctor. Diarrhea medicines may make the diarrhea worse or make it last longer.