November 25, 2015
Recommended Topic Related To:


"Today, the U.S. Food and Drug Administration approved Xuriden (uridine triacetate), the first FDA-approved treatment for patients with hereditary orotic aciduria. Hereditary orotic aciduria is a rare metabolic disorder, which has been reported in"...


Discontinued Warning IconPlease Note: This Brand Name drug is no longer available in the US.
(Generic versions may still be available.)

(erythromycin) Ointment


ILOTYCIN™ Erythromycin Ophthalmic Ointment belongs to the macrolide group of antibiotics. It is basic and readily forms a salt when combined with an acid. The base, as crystals or powder, is slightly soluble in water, moderately soluble in ether, and readily soluble in alcohol or chloroform. Erythromycin ((3R*, 4S*, 5S*, 6R*, 7R*, 9R*, 11R*, 12R*, 13S*, 14R*) -4-[(2,6-dideoxy-3-C-methyl-3-0-methyl-α-L-ribo-hexopyranosyl)oxy]-14-ethyl-7, 12,13-trihydroxy-3, 5, 7, 9, 11, 13-hexamethyl-6-[[3, 4, 6-trideoxy-3-(dimethylamino)-β-D-xylo-hexopyranosyl]oxy]oxacyclotetradecane-2, 10-dione) is an antibiotic produced from a strain of Streptomyces erythraeus. It has the following structural formula:

ILOTYCIN (erythromycin)  Structural Formula Illustration

Molecular Formula: C37H67NO13

Molecular Weight: 733.94

Each gram contains Erythromycin USP 5 mg in a sterile ophthalmic base of mineral oil and white petrolatum.

Last reviewed on RxList: 6/12/2012
This monograph has been modified to include the generic and brand name in many instances.

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

Women's Health

Find out what women really need.