Included as part of the PRECAUTIONS section.

Cardiovascular or Cerebrovascular Disorders

The physician should be alert to earliest signs of myocardial infarction, cerebrovascular disorders, arterial or venous thromboembolism (venous thromboembolism or pulmonary embolism), thrombophlebitis, or retinal thrombosis. Endometrin should be discontinued if any of these are suspected.

Depression

Patients with a history of depression need to be closely observed. Consider discontinuation if symptoms worsen.

Use of Other Vaginal Products

Endometrin should not be recommended for use with other vaginal products (such as antifungal products as this may alter progesterone release and absorption from the vaginal insert [see DRUG INTERACTIONS].

Patient Counseling Information

See FDA-Approved Patient Labeling

Vaginal Bleeding

Inform patients of the importance of reporting irregular vaginal bleeding to their doctor as soon as possible.

Common Adverse Reactions with Progesterone

Inform patients of the possible side effects of progesterone therapy such as headaches, breast tenderness, bloating, mood swings, irritability, and drowsiness.

Coadministration of Vaginal Products

Inform patients that Endometrin is not recommended for use with other vaginal products.

Nonclinical Toxicology

Carcinogenesis, Mutagenesis, Impairment of Fertility

Nonclinical toxicity studies to determine the potential of Endometrin to cause carcinogenicity or mutagenicity have not been performed. The effect of Endometrin on fertility has not been evaluated in animals.

Use In Specific Populations

Pregnancy

Endometrin has been used to support embryo implantation and maintain clinical pregnancy in one clinical study. The livebirth outcomes of these pregnancies were as follows:

Among the 404 subjects treated with Endometrin twice daily, 143 subjects had livebirths consisting of 85 singletons, 56 twins, and 2 triplets. In this treatment group, 13 subjects had a spontaneous abortion, 1 subject had an ectopic pregnancy, and 7 subjects reported fetal birth defects (3.4% based on 203 livebirths).

Among the 404 subjects treated with Endometrin three times daily, 155 subjects had livebirths consisting of 91 singletons, 60 twins, and 4 triplets. In this treatment group, 22 subjects had a spontaneous abortion, 4 subjects had an ectopic pregnancy, and 7 subjects reported fetal birth defects (3.1% based on 223 livebirths).

Birth defects reported in the Endometrin twice daily group included: one fetus with a cleft palate and intrauterine growth retardation, one fetus with spina bifida, three fetuses with congenital heart defects, one fetus with an umbilical hernia, and one fetus with an intestinal anomaly.

Birth defects reported in the Endometrin three times daily group included: one fetus with an esophageal fistula, one fetus with hypospadias and an underdeveloped right ear, one fetus with Down's and an atrial septal defect, one fetus with congenital heart anomalies, one fetus with DiGeorge's syndrome, one fetus with a hand deformity, and one fetus with cleft palate.

For additional information on the pharmacology of Endometrin and pregnancy outcome information [see CLINICAL PHARMACOLOGY and Clinical Studies Sections].

Nursing Mothers

Detectable amounts of progesterone have been identified in the milk of nursing mothers. The effect of this on the nursing infant has not been determined.

Pediatric Use

This drug is not intended for pediatric use and no clinical data have been collected in children. Therefore, the safety and effectiveness of Endometrin in pediatric patients have not been established.

Geriatric Use

No clinical data have been collected in patients over age 65.

Last reviewed on RxList: 4/22/2013
This monograph has been modified to include the generic and brand name in many instances.