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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.

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