LOESTRIN

This brand name is authorized in United States. It is also authorized in Canada.

Active ingredients

The drug LOESTRIN contains a combination of these active pharmaceutical ingredients (APIs):

1	Norethisterone UNII 9S44LIC7OJ - NORETHINDRONE ACETATE
	Norethisterone has progestational actions similar to those of progesterone, but is a more potent inhibitor of ovulation and has weak oestrogenic and androgenic properties. It is used to treat a number of disorders of the menstrual cycle.
	Read more about Norethisterone
2	17 alpha-Ethinylestradiol UNII 423D2T571U - ETHINYL ESTRADIOL
	Ethinylestradiol is chemically and biologically identical to endogenous human oestradiol. It substitutes for the loss of estrogen production in menopausal women, and alleviates menopausal symptoms. Estrogens prevent bone loss following menopause or ovariectomy.
	Read more about 17 alpha-Ethinylestradiol

Medication package inserts

Below package inserts are available for further reading:

Document	Type	Information Source
LOESTRIN / LOESTRIN FE Tablet	MPI, US: SPL/Old	FDA, National Drug Code (US)

Medicine classification

This drug has been classified in the anatomical therapeutic chemical (ATC) classification system as follows:

ATC Group		Classification
G03AB04	Norethisterone and ethinylestradiol	G Genito urinary system and sex hormones → G03 Sex hormones and modulators of the genital system → G03A Hormonal contraceptives for systemic use → G03AB Progestogens and estrogens, fixed combinations
Discover more medicines within G03AB04

Authorization and marketing

This drug has been assigned below unique identifiers within the countries it is being marketed:

Country	Identification scheme	Identifier(s)
CA	Health Products and Food Branch	00297143, 00353027
US	FDA, National Drug Code	51285-127, 51285-131