Thursday, November 21, 2024
Subscribe American Journal of Medicine Free Newsletter
Clinical ResearchAdherence to Oral Contraception in Women on Category X Medications

Adherence to Oral Contraception in Women on Category X Medications

Despite the added risk associated with unintended pregnancy, many women who receive Category X medications have refill patterns suggesting nonadherence to oral contraception. Compared with all women age 18-44, women receiving teratogenic medications do not have better adherence to oral contraception.

Abstract

Background

Over 6% of women become pregnant when taking teratogenic medications, and contraceptive counseling appears to occur at suboptimal rates. Adherence to contraception is an important component in preventing unwanted pregnancy and has not been evaluated in this population. We undertook a pharmacy claims-based analysis to evaluate the degree to which women of childbearing age who receive Category X medications adhere to their oral contraception.

Methods

We evaluated the prescription medication claims for over 6 million women, age 18-44 years, with prescription benefits administered by a pharmacy benefits manager. Women with 2 or more claims for a Category X medication and 2 or more claims for oral contraception were evaluated in further detail. Adherence to oral contraception was measured by analyzing pharmacy claims. Multivariable logistic regression was performed to identify factors associated with adherence.

Results

There were 146,758 women of childbearing age who received Category X medications, of which 26,136 also took oral contraceptive medication. Women who received Category X medications were prescribed oral contraception (18%) at rates similar to others of childbearing age (17%). Women prescribed both Category X and oral contraception demonstrated adherence similar to the overall population. Age, class of Category X medication, number of medications, prescriber’s specialty, and ethnicity correlated with lower adherence rates.

Conclusions

Despite added risk associated with unintended pregnancy, many women who receive Category X medications have refill patterns suggesting nonadherence to oral contraception. Compared with all women age 18-44 years, women receiving teratogenic medications do not have better adherence to oral contraception.

To read this article in its entirety, please visit ourwebsite.

 

–Amy Steinkellner, PharmD, William Chen, PhD, MPH, Shannon E. Denison, MA

This article originally appeared in theOctober 2010issue ofThe American Journal of Medicine.

 

Latest Posts

lupus

Sarcoidosis with Lupus Pernio in an Afro-Caribbean Man

A 54-year-old man of Afro-Caribbean ancestry presented with a 2-month history of nonproductive cough, 10-day history of constant subjective fevers, and a 1-day history...
Flue Vaccine

Flu Vaccination to Prevent Cardiovascular Mortality (video)

0
"Influenza can cause a significant burden on patients with coronary artery disease," write Barbetta et al in The American Journal of Medicine. For this...
varicella zoster

Varicella Zoster Virus-Induced Complete Heart Block

0
Complete heart block is usually caused by chronic myocardial ischemia and fibrosis but can also be induced by bacterial and viral infections. The varicella...
Racial justice in healthcare

Teaching Anti-Racism in the Clinical Environment

0
"Teaching Anti-Racism in the Clinical Environment: The Five-Minute Moment for Racial Justice in Healthcare" was originally published in the April 2023 issue of The...
Invisible hand of the market

The ‘Invisible Hand’ Doesn’t Work for Prescription Drugs

0
Pharmaceutical innovation has been responsible for many “miracles of modern medicine.” Reliance on the “invisible hand” of Adam Smith to allocate resources in the...
Joseph S. Alpert, MD

New Coronary Heart Disease Risk Factors

0
"New Coronary Heart Disease Risk Factors" by AJM Editor-in Chief Joseph S. Alpert, MD was originally published in the April 2023 issue of The...
Cardiovascular risk from noncardiac activities

Cardiac Risk Related to Noncardiac & Nonsurgical Activities

0
"Assessment of Cardiovascular Risk for Noncardiac and Nonsurgical Activities" was originally published in the April 2023 issue of The American Journal of Medicine. Cardiovascular risk...